diff --git a/v2rayN/ServiceLib/Enums/EViewAction.cs b/v2rayN/ServiceLib/Enums/EViewAction.cs
index a72e8765..4f84a7cf 100644
--- a/v2rayN/ServiceLib/Enums/EViewAction.cs
+++ b/v2rayN/ServiceLib/Enums/EViewAction.cs
@@ -29,6 +29,7 @@ public enum EViewAction
     DNSSettingWindow,
     RoutingSettingWindow,
     OptionSettingWindow,
+    CustomConfigWindow,
     GlobalHotkeySettingWindow,
     SubSettingWindow,
     DispatcherSpeedTest,
diff --git a/v2rayN/ServiceLib/Handler/AppHandler.cs b/v2rayN/ServiceLib/Handler/AppHandler.cs
index ad9a4029..d55245d4 100644
--- a/v2rayN/ServiceLib/Handler/AppHandler.cs
+++ b/v2rayN/ServiceLib/Handler/AppHandler.cs
@@ -64,6 +64,7 @@ public sealed class AppHandler
         SQLiteHelper.Instance.CreateTable<RoutingItem>();
         SQLiteHelper.Instance.CreateTable<ProfileExItem>();
         SQLiteHelper.Instance.CreateTable<DNSItem>();
+        SQLiteHelper.Instance.CreateTable<CustomConfigItem>();
         return true;
     }
 
@@ -203,6 +204,16 @@ public sealed class AppHandler
         return await SQLiteHelper.Instance.TableAsync<DNSItem>().FirstOrDefaultAsync(it => it.CoreType == eCoreType);
     }
 
+    public async Task<List<CustomConfigItem>?> CustomConfigItem()
+    {
+        return await SQLiteHelper.Instance.TableAsync<CustomConfigItem>().ToListAsync();
+    }
+
+    public async Task<CustomConfigItem?> GetCustomConfigItem(ECoreType eCoreType)
+    {
+        return await SQLiteHelper.Instance.TableAsync<CustomConfigItem>().FirstOrDefaultAsync(it => it.CoreType == eCoreType);
+    }
+
     #endregion SqliteHelper
 
     #region Core Type
diff --git a/v2rayN/ServiceLib/Handler/ConfigHandler.cs b/v2rayN/ServiceLib/Handler/ConfigHandler.cs
index 6c93d868..25d90be9 100644
--- a/v2rayN/ServiceLib/Handler/ConfigHandler.cs
+++ b/v2rayN/ServiceLib/Handler/ConfigHandler.cs
@@ -2184,6 +2184,54 @@ public class ConfigHandler
 
     #endregion DNS
 
+    #region Custom Config
+
+    public static async Task<int> InitBuiltinCustomConfig(Config config)
+    {
+        var items = await AppHandler.Instance.CustomConfigItem();
+        if (items.Count <= 0)
+        {
+            var item = new CustomConfigItem()
+            {
+                Remarks = "V2ray",
+                CoreType = ECoreType.Xray,
+            };
+            await SaveCustomConfigItem(config, item);
+
+            var item2 = new CustomConfigItem()
+            {
+                Remarks = "sing-box",
+                CoreType = ECoreType.sing_box,
+            };
+            await SaveCustomConfigItem(config, item2);
+        }
+
+        return 0;
+    }
+    public static async Task<int> SaveCustomConfigItem(Config config, CustomConfigItem item)
+    {
+        if (item == null)
+        {
+            return -1;
+        }
+
+        if (item.Id.IsNullOrEmpty())
+        {
+            item.Id = Utils.GetGuid(false);
+        }
+
+        if (await SQLiteHelper.Instance.ReplaceAsync(item) > 0)
+        {
+            return 0;
+        }
+        else
+        {
+            return -1;
+        }
+    }
+
+    #endregion Custom Config
+
     #region Regional Presets
 
     /// <summary>
diff --git a/v2rayN/ServiceLib/Models/CustomConfigItem.cs b/v2rayN/ServiceLib/Models/CustomConfigItem.cs
new file mode 100644
index 00000000..3d4b6453
--- /dev/null
+++ b/v2rayN/ServiceLib/Models/CustomConfigItem.cs
@@ -0,0 +1,18 @@
+using SQLite;
+
+namespace ServiceLib.Models;
+
+[Serializable]
+public class CustomConfigItem
+{
+    [PrimaryKey]
+    public string Id { get; set; }
+
+    public string Remarks { get; set; }
+    public bool Enabled { get; set; } = false;
+    public ECoreType CoreType { get; set; }
+    public string? Config { get; set; }
+    public string? TunConfig { get; set; }
+    public bool? AddProxyOnly { get; set; } = false;
+    public string? ProxyDetour { get; set; }
+}
diff --git a/v2rayN/ServiceLib/Resx/ResUI.Designer.cs b/v2rayN/ServiceLib/Resx/ResUI.Designer.cs
index ca554860..5f64c8b1 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.Designer.cs
+++ b/v2rayN/ServiceLib/Resx/ResUI.Designer.cs
@@ -1,4 +1,4 @@
-//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
 // <auto-generated>
 //     此代码由工具生成。
 //     运行时版本:4.0.30319.42000
@@ -186,6 +186,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Please fill in the correct custom config 的本地化字符串。
+        /// </summary>
+        public static string FillCorrectConfigText {
+            get {
+                return ResourceManager.GetString("FillCorrectConfigText", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Please fill in the correct custom DNS 的本地化字符串。
         /// </summary>
@@ -852,6 +861,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Custom Config 的本地化字符串。
+        /// </summary>
+        public static string menuCustomConfig {
+            get {
+                return ResourceManager.GetString("menuCustomConfig", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 DNS Settings 的本地化字符串。
         /// </summary>
@@ -2220,6 +2238,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Do Not Add Non-Proxy Protocol Outbound 的本地化字符串。
+        /// </summary>
+        public static string TbAddProxyProtocolOutboundOnly {
+            get {
+                return ResourceManager.GetString("TbAddProxyProtocolOutboundOnly", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Address 的本地化字符串。
         /// </summary>
@@ -2337,6 +2364,42 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Enable Custom Config 的本地化字符串。
+        /// </summary>
+        public static string TbCustomConfigEnable {
+            get {
+                return ResourceManager.GetString("TbCustomConfigEnable", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 sing-box Custom Config 的本地化字符串。
+        /// </summary>
+        public static string TbCustomConfigSingbox {
+            get {
+                return ResourceManager.GetString("TbCustomConfigSingbox", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Enable Custom DNS 的本地化字符串。
+        /// </summary>
+        public static string TbCustomDNSEnable {
+            get {
+                return ResourceManager.GetString("TbCustomDNSEnable", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Custom DNS Enabled, This Page&apos;s Settings Invalid 的本地化字符串。
+        /// </summary>
+        public static string TbCustomDNSEnabledPageInvalid {
+            get {
+                return ResourceManager.GetString("TbCustomDNSEnabledPageInvalid", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Display GUI 的本地化字符串。
         /// </summary>
@@ -2643,6 +2706,24 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 v2ray Custom Config 的本地化字符串。
+        /// </summary>
+        public static string TbRayCustomConfig {
+            get {
+                return ResourceManager.GetString("TbRayCustomConfig", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Add Outbound Config Only, routing.balancers and routing.rules.outboundTag 的本地化字符串。
+        /// </summary>
+        public static string TbRayCustomConfigDesc {
+            get {
+                return ResourceManager.GetString("TbRayCustomConfigDesc", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Alias (remarks) 的本地化字符串。
         /// </summary>
@@ -2760,6 +2841,78 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Add Outbound and Endpoint Config Only 的本地化字符串。
+        /// </summary>
+        public static string TbSBCustomConfigDesc {
+            get {
+                return ResourceManager.GetString("TbSBCustomConfigDesc", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 sing-box Direct Resolution Strategy 的本地化字符串。
+        /// </summary>
+        public static string TbSBDirectResolveStrategy {
+            get {
+                return ResourceManager.GetString("TbSBDirectResolveStrategy", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 The sing-box DoH resolution server can be overwritten 的本地化字符串。
+        /// </summary>
+        public static string TbSBDoHOverride {
+            get {
+                return ResourceManager.GetString("TbSBDoHOverride", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 sing-box DoH Resolver Server 的本地化字符串。
+        /// </summary>
+        public static string TbSBDoHResolverServer {
+            get {
+                return ResourceManager.GetString("TbSBDoHResolverServer", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Fallback DNS Resolution, Suggest IP 的本地化字符串。
+        /// </summary>
+        public static string TbSBFallbackDNSResolve {
+            get {
+                return ResourceManager.GetString("TbSBFallbackDNSResolve", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Resolve Outbound Domains 的本地化字符串。
+        /// </summary>
+        public static string TbSBOutboundDomainResolve {
+            get {
+                return ResourceManager.GetString("TbSBOutboundDomainResolve", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 Outbound DNS Resolution (sing-box) 的本地化字符串。
+        /// </summary>
+        public static string TbSBOutboundsResolverDNS {
+            get {
+                return ResourceManager.GetString("TbSBOutboundsResolverDNS", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 sing-box Remote Resolution Strategy 的本地化字符串。
+        /// </summary>
+        public static string TbSBRemoteResolveStrategy {
+            get {
+                return ResourceManager.GetString("TbSBRemoteResolveStrategy", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Encryption method (security) 的本地化字符串。
         /// </summary>
@@ -3543,6 +3696,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Set Upstream Proxy Tag 的本地化字符串。
+        /// </summary>
+        public static string TbSetUpstreamProxyDetour {
+            get {
+                return ResourceManager.GetString("TbSetUpstreamProxyDetour", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Short Id 的本地化字符串。
         /// </summary>
diff --git a/v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx b/v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx
index bd2cb887..77ab1f56 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx
@@ -1404,4 +1404,28 @@
   <data name="menuAddAnytlsServer" xml:space="preserve">
     <value>Add [Anytls] Configuration</value>
   </data>
+  <data name="menuCustomConfig" xml:space="preserve">
+    <value>Custom Config</value>
+  </data>
+  <data name="TbCustomConfigEnable" xml:space="preserve">
+    <value>Enable Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfig" xml:space="preserve">
+    <value>v2ray Custom Config</value>
+  </data>
+  <data name="TbCustomConfigSingbox" xml:space="preserve">
+    <value>sing-box Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound Config Only, routing.balancers and routing.rules.outboundTag</value>
+  </data>
+  <data name="TbSBCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound and Endpoint Config Only</value>
+  </data>
+  <data name="TbAddProxyProtocolOutboundOnly" xml:space="preserve">
+    <value>Do Not Add Non-Proxy Protocol Outbound</value>
+  </data>
+  <data name="TbSetUpstreamProxyDetour" xml:space="preserve">
+    <value>Set Upstream Proxy Tag</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/v2rayN/ServiceLib/Resx/ResUI.hu.resx b/v2rayN/ServiceLib/Resx/ResUI.hu.resx
index 0fc30153..02fd64aa 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.hu.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.hu.resx
@@ -1404,4 +1404,28 @@
   <data name="menuAddAnytlsServer" xml:space="preserve">
     <value>[Anytls] konfiguráció hozzáadása</value>
   </data>
+  <data name="menuCustomConfig" xml:space="preserve">
+    <value>Custom Config</value>
+  </data>
+  <data name="TbCustomConfigEnable" xml:space="preserve">
+    <value>Enable Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfig" xml:space="preserve">
+    <value>v2ray Custom Config</value>
+  </data>
+  <data name="TbCustomConfigSingbox" xml:space="preserve">
+    <value>sing-box Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound Config Only, routing.balancers and routing.rules.outboundTag</value>
+  </data>
+  <data name="TbSBCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound and Endpoint Config Only</value>
+  </data>
+  <data name="TbAddProxyProtocolOutboundOnly" xml:space="preserve">
+    <value>Do Not Add Non-Proxy Protocol Outbound</value>
+  </data>
+  <data name="TbSetUpstreamProxyDetour" xml:space="preserve">
+    <value>Set Upstream Proxy Tag</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/v2rayN/ServiceLib/Resx/ResUI.resx b/v2rayN/ServiceLib/Resx/ResUI.resx
index 7ecfcc98..87eb1164 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.resx
@@ -1404,4 +1404,28 @@
   <data name="menuAddAnytlsServer" xml:space="preserve">
     <value>Add [Anytls] Configuration</value>
   </data>
+  <data name="menuCustomConfig" xml:space="preserve">
+    <value>Custom Config</value>
+  </data>
+  <data name="TbCustomConfigEnable" xml:space="preserve">
+    <value>Enable Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfig" xml:space="preserve">
+    <value>v2ray Custom Config</value>
+  </data>
+  <data name="TbCustomConfigSingbox" xml:space="preserve">
+    <value>sing-box Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound Config Only, routing.balancers and routing.rules.outboundTag</value>
+  </data>
+  <data name="TbSBCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound and Endpoint Config Only</value>
+  </data>
+  <data name="TbAddProxyProtocolOutboundOnly" xml:space="preserve">
+    <value>Do Not Add Non-Proxy Protocol Outbound</value>
+  </data>
+  <data name="TbSetUpstreamProxyDetour" xml:space="preserve">
+    <value>Set Upstream Proxy Tag</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/v2rayN/ServiceLib/Resx/ResUI.ru.resx b/v2rayN/ServiceLib/Resx/ResUI.ru.resx
index 25f17e0d..c8307960 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.ru.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.ru.resx
@@ -1404,4 +1404,28 @@
   <data name="menuAddAnytlsServer" xml:space="preserve">
     <value>Добавить сервер [Anytls]</value>
   </data>
+  <data name="menuCustomConfig" xml:space="preserve">
+    <value>Custom Config</value>
+  </data>
+  <data name="TbCustomConfigEnable" xml:space="preserve">
+    <value>Enable Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfig" xml:space="preserve">
+    <value>v2ray Custom Config</value>
+  </data>
+  <data name="TbCustomConfigSingbox" xml:space="preserve">
+    <value>sing-box Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound Config Only, routing.balancers and routing.rules.outboundTag</value>
+  </data>
+  <data name="TbSBCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound and Endpoint Config Only</value>
+  </data>
+  <data name="TbAddProxyProtocolOutboundOnly" xml:space="preserve">
+    <value>Do Not Add Non-Proxy Protocol Outbound</value>
+  </data>
+  <data name="TbSetUpstreamProxyDetour" xml:space="preserve">
+    <value>Set Upstream Proxy Tag</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx b/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
index 95d69e9b..f6ae31ad 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
@@ -1401,4 +1401,28 @@
   <data name="menuAddAnytlsServer" xml:space="preserve">
     <value>添加 [Anytls] 配置文件</value>
   </data>
+  <data name="menuCustomConfig" xml:space="preserve">
+    <value>自定义配置</value>
+  </data>
+  <data name="TbCustomConfigEnable" xml:space="preserve">
+    <value>启用自定义配置</value>
+  </data>
+  <data name="TbRayCustomConfig" xml:space="preserve">
+    <value>v2ray 自定义配置</value>
+  </data>
+  <data name="TbCustomConfigSingbox" xml:space="preserve">
+    <value>sing-box 自定义配置</value>
+  </data>
+  <data name="TbRayCustomConfigDesc" xml:space="preserve">
+    <value>仅添加出站配置，routing.balancers 和 routing.rules.outboundTag</value>
+  </data>
+  <data name="TbSBCustomConfigDesc" xml:space="preserve">
+    <value>仅添加出站和端点配置</value>
+  </data>
+  <data name="TbAddProxyProtocolOutboundOnly" xml:space="preserve">
+    <value>不添加非代理协议出站</value>
+  </data>
+  <data name="TbSetUpstreamProxyDetour" xml:space="preserve">
+    <value>设置上游代理 tag</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx b/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx
index 0b23885c..39fb0cb7 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx
@@ -1401,4 +1401,28 @@
   <data name="menuAddAnytlsServer" xml:space="preserve">
     <value>新增 [Anytls] 設定檔</value>
   </data>
+  <data name="menuCustomConfig" xml:space="preserve">
+    <value>Custom Config</value>
+  </data>
+  <data name="TbCustomConfigEnable" xml:space="preserve">
+    <value>Enable Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfig" xml:space="preserve">
+    <value>v2ray Custom Config</value>
+  </data>
+  <data name="TbCustomConfigSingbox" xml:space="preserve">
+    <value>sing-box Custom Config</value>
+  </data>
+  <data name="TbRayCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound Config Only, routing.balancers and routing.rules.outboundTag</value>
+  </data>
+  <data name="TbSBCustomConfigDesc" xml:space="preserve">
+    <value>Add Outbound and Endpoint Config Only</value>
+  </data>
+  <data name="TbAddProxyProtocolOutboundOnly" xml:space="preserve">
+    <value>Do Not Add Non-Proxy Protocol Outbound</value>
+  </data>
+  <data name="TbSetUpstreamProxyDetour" xml:space="preserve">
+    <value>Set Upstream Proxy Tag</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs
index 80b89654..4996b208 100644
--- a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs
@@ -2,6 +2,8 @@ using System.Data;
 using System.Net;
 using System.Net.NetworkInformation;
 using System.Reactive;
+using System.Text;
+using System.Text.Json.Nodes;
 using DynamicData;
 using ServiceLib.Models;
 
@@ -81,7 +83,9 @@ public class CoreConfigSingboxService
 
             ret.Msg = string.Format(ResUI.SuccessfulConfiguration, "");
             ret.Success = true;
-            ret.Data = JsonUtils.Serialize(singboxConfig);
+
+            var customConfig = await AppHandler.Instance.GetCustomConfigItem(ECoreType.sing_box);
+            ret.Data = await ApplyCustomConfig(customConfig, singboxConfig);
             return ret;
         }
         catch (Exception ex)
@@ -421,7 +425,9 @@ public class CoreConfigSingboxService
             await ConvertGeo2Ruleset(singboxConfig);
 
             ret.Success = true;
-            ret.Data = JsonUtils.Serialize(singboxConfig);
+
+            var customConfig = await AppHandler.Instance.GetCustomConfigItem(ECoreType.sing_box);
+            ret.Data = await ApplyCustomConfig(customConfig, singboxConfig);
             return ret;
         }
         catch (Exception ex)
@@ -1970,5 +1976,61 @@ public class CoreConfigSingboxService
         return 0;
     }
 
+    private async Task<string> ApplyCustomConfig(CustomConfigItem customConfig, SingboxConfig singboxConfig)
+    {
+        var customConfigItem = customConfig.Config;
+        if (_config.TunModeItem.EnableTun)
+        {
+            customConfigItem = customConfig.TunConfig;
+        }
+
+        if (!customConfig.Enabled || customConfigItem.IsNullOrEmpty())
+        {
+            return JsonUtils.Serialize(singboxConfig);
+        }
+
+        var customConfigNode = JsonNode.Parse(customConfigItem);
+        if (customConfigNode == null)
+        {
+            return JsonUtils.Serialize(singboxConfig);
+        }
+
+        // Process outbounds
+        var customOutboundsNode = customConfigNode["outbounds"] is JsonArray outbounds ? outbounds : new JsonArray();
+        foreach (var outbound in singboxConfig.outbounds)
+        {
+            if (outbound.type.ToLower() is "direct" or "block")
+            {
+                if (customConfig.AddProxyOnly == true)
+                {
+                    continue;
+                }
+            }
+            else if (outbound.detour.IsNullOrEmpty() && (!customConfig.ProxyDetour.IsNullOrEmpty()) && !Utils.IsPrivateNetwork(outbound.server ?? string.Empty))
+            {
+                outbound.detour = customConfig.ProxyDetour;
+            }
+            customOutboundsNode.Add(JsonUtils.DeepCopy(outbound));
+        }
+        customConfigNode["outbounds"] = customOutboundsNode;
+
+        // Process endpoints
+        if (singboxConfig.endpoints != null && singboxConfig.endpoints.Count > 0)
+        {
+            var customEndpointsNode = customConfigNode["endpoints"] is JsonArray endpoints ? endpoints : new JsonArray();
+            foreach (var endpoint in singboxConfig.endpoints)
+            {
+                if (endpoint.detour.IsNullOrEmpty() && (!customConfig.ProxyDetour.IsNullOrEmpty()))
+                {
+                    endpoint.detour = customConfig.ProxyDetour;
+                }
+                customEndpointsNode.Add(JsonUtils.DeepCopy(endpoint));
+            }
+            customConfigNode["endpoints"] = customEndpointsNode;
+        }
+
+        return await Task.FromResult(JsonUtils.Serialize(customConfigNode));
+    }
+
     #endregion private gen function
 }
diff --git a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs
index 60b4df3e..c6d0aeb3 100644
--- a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs
@@ -1,6 +1,8 @@
 using System.Net;
 using System.Net.NetworkInformation;
 using System.Text.Json.Nodes;
+using System.Text.Json.Serialization;
+using ServiceLib.Models;
 
 namespace ServiceLib.Services.CoreConfig;
 
@@ -66,7 +68,9 @@ public class CoreConfigV2rayService
 
             ret.Msg = string.Format(ResUI.SuccessfulConfiguration, "");
             ret.Success = true;
-            ret.Data = JsonUtils.Serialize(v2rayConfig);
+
+            var customConfig = await AppHandler.Instance.GetCustomConfigItem(ECoreType.Xray);
+            ret.Data = await ApplyCustomConfig(customConfig, v2rayConfig);
             return ret;
         }
         catch (Exception ex)
@@ -195,7 +199,9 @@ public class CoreConfigV2rayService
             }
 
             ret.Success = true;
-            ret.Data = JsonUtils.Serialize(v2rayConfig);
+
+            var customConfig = await AppHandler.Instance.GetCustomConfigItem(ECoreType.Xray);
+            ret.Data = await ApplyCustomConfig(customConfig, v2rayConfig, true);
             return ret;
         }
         catch (Exception ex)
@@ -1570,5 +1576,83 @@ public class CoreConfigV2rayService
         return await Task.FromResult(0);
     }
 
+    private async Task<string> ApplyCustomConfig(CustomConfigItem customConfig, V2rayConfig v2rayConfig, bool handleBalancerAndRules = false)
+    {
+        if (!customConfig.Enabled || customConfig.Config.IsNullOrEmpty())
+        {
+            return JsonUtils.Serialize(v2rayConfig);
+        }
+
+        var customConfigNode = JsonNode.Parse(customConfig.Config);
+        if (customConfigNode == null)
+        {
+            return JsonUtils.Serialize(v2rayConfig);
+        }
+
+        // Handle balancer and rules modifications (for multiple load scenarios)
+        if (handleBalancerAndRules && v2rayConfig.routing?.balancers?.Count > 0)
+        {
+            var balancer = v2rayConfig.routing.balancers.First();
+
+            // Modify existing rules in custom config
+            var rulesNode = customConfigNode["routing"]?["rules"];
+            if (rulesNode != null)
+            {
+                foreach (var rule in rulesNode.AsArray())
+                {
+                    if (rule["outboundTag"]?.GetValue<string>() == Global.ProxyTag)
+                    {
+                        rule.AsObject().Remove("outboundTag");
+                        rule["balancerTag"] = balancer.tag;
+                    }
+                }
+            }
+
+            // Ensure routing node exists
+            if (customConfigNode["routing"] == null)
+            {
+                customConfigNode["routing"] = new JsonObject();
+            }
+
+            // Handle balancers - append instead of override
+            if (customConfigNode["routing"]["balancers"] is JsonArray customBalancersNode)
+            {
+                if (JsonNode.Parse(JsonUtils.Serialize(v2rayConfig.routing.balancers)) is JsonArray newBalancers)
+                {
+                    foreach (var balancerNode in newBalancers)
+                    {
+                        customBalancersNode.Add(balancerNode?.DeepClone());
+                    }
+                }
+            }
+            else
+            {
+                customConfigNode["routing"]["balancers"] = JsonNode.Parse(JsonUtils.Serialize(v2rayConfig.routing.balancers));
+            }
+        }
+
+        // Handle outbounds - append instead of override
+        var customOutboundsNode = customConfigNode["outbounds"] is JsonArray outbounds ? outbounds : new JsonArray();
+        foreach (var outbound in v2rayConfig.outbounds)
+        {
+            if (outbound.protocol.ToLower() is "blackhole" or "dns" or "freedom")
+            {
+                if (customConfig.AddProxyOnly == true)
+                {
+                    continue;
+                }
+            }
+            else if ((outbound.streamSettings?.sockopt?.dialerProxy.IsNullOrEmpty() == true) && (!customConfig.ProxyDetour.IsNullOrEmpty()) && !(Utils.IsPrivateNetwork(outbound.settings?.servers?.FirstOrDefault()?.address ?? string.Empty) || Utils.IsPrivateNetwork(outbound.settings?.vnext?.FirstOrDefault()?.address ?? string.Empty)))
+            {
+                outbound.streamSettings ??= new StreamSettings4Ray();
+                outbound.streamSettings.sockopt ??= new Sockopt4Ray();
+                outbound.streamSettings.sockopt.dialerProxy = customConfig.ProxyDetour;
+            }
+            customOutboundsNode.Add(JsonUtils.DeepCopy(outbound));
+        }
+
+        return await Task.FromResult(JsonUtils.Serialize(customConfigNode));
+    }
+
     #endregion private gen function
 }
diff --git a/v2rayN/ServiceLib/ViewModels/CustomConfigViewModel.cs b/v2rayN/ServiceLib/ViewModels/CustomConfigViewModel.cs
new file mode 100644
index 00000000..75d7d5be
--- /dev/null
+++ b/v2rayN/ServiceLib/ViewModels/CustomConfigViewModel.cs
@@ -0,0 +1,110 @@
+using System.Reactive;
+using DynamicData.Binding;
+using ReactiveUI;
+using ReactiveUI.Fody.Helpers;
+
+namespace ServiceLib.ViewModels;
+public class CustomConfigViewModel : MyReactiveObject
+{
+    #region Reactive
+    [Reactive]
+    public bool EnableCustomConfig4Ray { get; set; }
+
+    [Reactive]
+    public bool EnableCustomConfig4Singbox { get; set; }
+
+    [Reactive]
+    public string CustomConfig4Ray { get; set; }
+
+    [Reactive]
+    public string CustomConfig4Singbox { get; set; }
+
+    [Reactive]
+    public string CustomTunConfig4Singbox { get; set; }
+
+    [Reactive]
+    public bool AddProxyOnly4Ray { get; set; }
+
+    [Reactive]
+    public bool AddProxyOnly4Singbox { get; set; }
+
+    [Reactive]
+    public string ProxyDetour4Ray { get; set; }
+
+    [Reactive]
+    public string ProxyDetour4Singbox { get; set; }
+
+    public ReactiveCommand<Unit, Unit> SaveCmd { get; }
+    #endregion Reactive
+
+    public CustomConfigViewModel(Func<EViewAction, object?, Task<bool>>? updateView)
+    {
+        _config = AppHandler.Instance.Config;
+        _updateView = updateView;
+        SaveCmd = ReactiveCommand.CreateFromTask(async () =>
+        {
+            await SaveSettingAsync();
+        });
+
+        _ = Init();
+    }
+    private async Task Init()
+    {
+        var item = await AppHandler.Instance.GetCustomConfigItem(ECoreType.Xray);
+        EnableCustomConfig4Ray = item?.Enabled ?? false;
+        CustomConfig4Ray = item?.Config ?? string.Empty;
+        AddProxyOnly4Ray = item?.AddProxyOnly ?? false;
+        ProxyDetour4Ray = item?.ProxyDetour ?? string.Empty;
+
+        var item2 = await AppHandler.Instance.GetCustomConfigItem(ECoreType.sing_box);
+        EnableCustomConfig4Singbox = item2?.Enabled ?? false;
+        CustomConfig4Singbox = item2?.Config ?? string.Empty;
+        CustomTunConfig4Singbox = item2?.TunConfig ?? string.Empty;
+        AddProxyOnly4Singbox = item2?.AddProxyOnly ?? false;
+        ProxyDetour4Singbox = item2?.ProxyDetour ?? string.Empty;
+    }
+
+    private async Task SaveSettingAsync()
+    {
+        if (!await SaveXrayConfigAsync())
+            return;
+
+        if (!await SaveSingboxConfigAsync())
+            return;
+
+        NoticeHandler.Instance.Enqueue(ResUI.OperationSuccess);
+        _ = _updateView?.Invoke(EViewAction.CloseWindow, null);
+    }
+
+    private async Task<bool> SaveXrayConfigAsync()
+    {
+        var item = await AppHandler.Instance.GetCustomConfigItem(ECoreType.Xray);
+        item.Enabled = EnableCustomConfig4Ray;
+        item.Config = null;
+
+        item.Config = CustomConfig4Ray;
+
+        item.AddProxyOnly = AddProxyOnly4Ray;
+        item.ProxyDetour = ProxyDetour4Ray;
+
+        await ConfigHandler.SaveCustomConfigItem(_config, item);
+        return true;
+    }
+
+    private async Task<bool> SaveSingboxConfigAsync()
+    {
+        var item = await AppHandler.Instance.GetCustomConfigItem(ECoreType.sing_box);
+        item.Enabled = EnableCustomConfig4Singbox;
+        item.Config = null;
+        item.TunConfig = null;
+
+        item.Config = CustomConfig4Singbox;
+        item.TunConfig = CustomTunConfig4Singbox;
+
+        item.AddProxyOnly = AddProxyOnly4Singbox;
+        item.ProxyDetour = ProxyDetour4Singbox;
+
+        await ConfigHandler.SaveCustomConfigItem(_config, item);
+        return true;
+    }
+}
diff --git a/v2rayN/ServiceLib/ViewModels/MainWindowViewModel.cs b/v2rayN/ServiceLib/ViewModels/MainWindowViewModel.cs
index 36e20a87..71536ab2 100644
--- a/v2rayN/ServiceLib/ViewModels/MainWindowViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/MainWindowViewModel.cs
@@ -39,6 +39,7 @@ public class MainWindowViewModel : MyReactiveObject
 
     public ReactiveCommand<Unit, Unit> RoutingSettingCmd { get; }
     public ReactiveCommand<Unit, Unit> DNSSettingCmd { get; }
+    public ReactiveCommand<Unit, Unit> CustomConfigCmd { get; }
     public ReactiveCommand<Unit, Unit> GlobalHotkeySettingCmd { get; }
     public ReactiveCommand<Unit, Unit> RebootAsAdminCmd { get; }
     public ReactiveCommand<Unit, Unit> ClearServerStatisticsCmd { get; }
@@ -169,6 +170,10 @@ public class MainWindowViewModel : MyReactiveObject
         {
             await DNSSettingAsync();
         });
+        CustomConfigCmd = ReactiveCommand.CreateFromTask(async () =>
+        {
+            await CustomConfigAsync();
+        });
         GlobalHotkeySettingCmd = ReactiveCommand.CreateFromTask(async () =>
         {
             if (await _updateView?.Invoke(EViewAction.GlobalHotkeySettingWindow, null) == true)
@@ -220,6 +225,7 @@ public class MainWindowViewModel : MyReactiveObject
 
         await ConfigHandler.InitBuiltinRouting(_config);
         await ConfigHandler.InitBuiltinDNS(_config);
+        await ConfigHandler.InitBuiltinCustomConfig(_config);
         await ProfileExHandler.Instance.Init();
         await CoreHandler.Instance.Init(_config, UpdateHandler);
         TaskHandler.Instance.RegUpdateTask(_config, UpdateTaskHandler);
@@ -508,6 +514,15 @@ public class MainWindowViewModel : MyReactiveObject
         }
     }
 
+    private async Task CustomConfigAsync()
+    {
+        var ret = await _updateView?.Invoke(EViewAction.CustomConfigWindow, null);
+        if (ret == true)
+        {
+            await Reload();
+        }
+    }
+
     public async Task RebootAsAdmin()
     {
         ProcUtils.RebootAsAdmin();
diff --git a/v2rayN/v2rayN.Desktop/Views/CustomConfigWindow.axaml b/v2rayN/v2rayN.Desktop/Views/CustomConfigWindow.axaml
new file mode 100644
index 00000000..fcfedfe7
--- /dev/null
+++ b/v2rayN/v2rayN.Desktop/Views/CustomConfigWindow.axaml
@@ -0,0 +1,182 @@
+<Window
+    x:Class="v2rayN.Desktop.Views.CustomConfigWindow"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:resx="clr-namespace:ServiceLib.Resx;assembly=ServiceLib"
+    xmlns:vms="clr-namespace:ServiceLib.ViewModels;assembly=ServiceLib"
+    Title="{x:Static resx:ResUI.menuCustomConfig}"
+    Width="900"
+    Height="600"
+    x:DataType="vms:CustomConfigViewModel"
+    ShowInTaskbar="False"
+    WindowStartupLocation="CenterScreen"
+    mc:Ignorable="d">
+    <DockPanel Margin="{StaticResource Margin8}">
+        <StackPanel
+            Margin="{StaticResource Margin4}"
+            HorizontalAlignment="Center"
+            DockPanel.Dock="Bottom"
+            Orientation="Horizontal">
+            <Button
+                x:Name="btnSave"
+                Width="100"
+                Content="{x:Static resx:ResUI.TbConfirm}"
+                Cursor="Hand"
+                IsDefault="True" />
+            <Button
+                x:Name="btnCancel"
+                Width="100"
+                Margin="{StaticResource MarginLr8}"
+                Content="{x:Static resx:ResUI.TbCancel}"
+                Cursor="Hand"
+                IsCancel="True" />
+        </StackPanel>
+
+        <TabControl HorizontalContentAlignment="Stretch">
+            <TabItem HorizontalAlignment="Left" Header="{x:Static resx:ResUI.TbRayCustomConfig}">
+                <DockPanel Margin="{StaticResource Margin4}">
+                    <Grid DockPanel.Dock="Top" RowDefinitions="Auto,Auto">
+
+                        <StackPanel Grid.Row="0" Orientation="Horizontal">
+                            <TextBlock
+                                Grid.Row="0"
+                                Margin="{StaticResource Margin4}"
+                                VerticalAlignment="Center"
+                                Text="{x:Static resx:ResUI.TbRayCustomConfigDesc}" />
+                        </StackPanel>
+
+                        <StackPanel Grid.Row="1" Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin4}"
+                                VerticalAlignment="Center"
+                                Text="{x:Static resx:ResUI.TbCustomConfigEnable}" />
+                            <ToggleSwitch
+                                x:Name="rayCustomConfigEnable"
+                                Margin="{StaticResource Margin4}"
+                                HorizontalAlignment="Left" />
+                        </StackPanel>
+                    </Grid>
+
+                    <WrapPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin4}"
+                                VerticalAlignment="Center"
+                                Text="{x:Static resx:ResUI.TbAddProxyProtocolOutboundOnly}" />
+                            <ToggleSwitch
+                                x:Name="togAddProxyProtocolOutboundOnly4Ray"
+                                Margin="{StaticResource Margin4}"
+                                HorizontalAlignment="Left" />
+                        </StackPanel>
+
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin4}"
+                                VerticalAlignment="Center"
+                                Text="{x:Static resx:ResUI.TbSetUpstreamProxyDetour}" />
+                            <TextBox
+                                x:Name="txtProxyDetour4Ray"
+                                Width="200"
+                                Margin="{StaticResource Margin4}" />
+                        </StackPanel>
+                    </WrapPanel>
+
+                    <HeaderedContentControl
+                        Margin="{StaticResource Margin4}"
+                        BorderBrush="Gray"
+                        BorderThickness="1"
+                        Header="xray json config">
+                        <TextBox
+                            x:Name="rayCustomConfig"
+                            VerticalAlignment="Stretch"
+                            Classes="TextArea"
+                            MinLines="10"
+                            TextWrapping="Wrap" />
+                    </HeaderedContentControl>
+                </DockPanel>
+            </TabItem>
+            <TabItem HorizontalAlignment="Left" Header="{x:Static resx:ResUI.TbCustomConfigSingbox}">
+                <DockPanel Margin="{StaticResource Margin4}">
+                    <Grid DockPanel.Dock="Top" RowDefinitions="Auto,Auto">
+
+                        <StackPanel Grid.Row="0" Orientation="Horizontal">
+                            <TextBlock
+                                Grid.Row="0"
+                                Margin="{StaticResource Margin4}"
+                                VerticalAlignment="Center"
+                                Text="{x:Static resx:ResUI.TbSBCustomConfigDesc}" />
+                        </StackPanel>
+
+                        <StackPanel Grid.Row="1" Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin4}"
+                                VerticalAlignment="Center"
+                                Text="{x:Static resx:ResUI.TbCustomConfigEnable}" />
+                            <ToggleSwitch
+                                x:Name="sbCustomConfigEnable"
+                                Margin="{StaticResource Margin4}"
+                                HorizontalAlignment="Left" />
+                        </StackPanel>
+                    </Grid>
+
+                    <WrapPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin4}"
+                                VerticalAlignment="Center"
+                                Text="{x:Static resx:ResUI.TbAddProxyProtocolOutboundOnly}" />
+                            <ToggleSwitch
+                                x:Name="togAddProxyProtocolOutboundOnly4Singbox"
+                                Margin="{StaticResource Margin4}"
+                                HorizontalAlignment="Left" />
+                        </StackPanel>
+
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin4}"
+                                VerticalAlignment="Center"
+                                Text="{x:Static resx:ResUI.TbSetUpstreamProxyDetour}" />
+                            <TextBox
+                                x:Name="txtProxyDetour4Singbox"
+                                Width="200"
+                                Margin="{StaticResource Margin4}" />
+                        </StackPanel>
+                    </WrapPanel>
+
+                    <Grid Margin="{StaticResource Margin4}" ColumnDefinitions="*,10,*">
+
+                        <HeaderedContentControl
+                            Grid.Column="0"
+                            BorderBrush="Gray"
+                            BorderThickness="1"
+                            Header="sing-box json config">
+                            <TextBox
+                                x:Name="sbCustomConfig"
+                                VerticalAlignment="Stretch"
+                                Classes="TextArea"
+                                MinLines="10"
+                                TextWrapping="Wrap" />
+                        </HeaderedContentControl>
+
+                        <GridSplitter Grid.Column="1" HorizontalAlignment="Stretch" />
+
+                        <HeaderedContentControl
+                            Grid.Column="2"
+                            BorderBrush="Gray"
+                            BorderThickness="1"
+                            Header="sing-box json tun config">
+                            <TextBox
+                                x:Name="sbCustomTunConfig"
+                                VerticalAlignment="Stretch"
+                                Classes="TextArea"
+                                MinLines="10"
+                                TextWrapping="Wrap" />
+                        </HeaderedContentControl>
+                    </Grid>
+                </DockPanel>
+            </TabItem>
+        </TabControl>
+    </DockPanel>
+</Window>
diff --git a/v2rayN/v2rayN.Desktop/Views/CustomConfigWindow.axaml.cs b/v2rayN/v2rayN.Desktop/Views/CustomConfigWindow.axaml.cs
new file mode 100644
index 00000000..e5a72cde
--- /dev/null
+++ b/v2rayN/v2rayN.Desktop/Views/CustomConfigWindow.axaml.cs
@@ -0,0 +1,46 @@
+using System.Reactive.Disposables;
+using Avalonia.Interactivity;
+using ReactiveUI;
+using v2rayN.Desktop.Base;
+
+namespace v2rayN.Desktop.Views;
+
+public partial class CustomConfigWindow : WindowBase<CustomConfigViewModel>
+{
+    private static Config _config;
+
+    public CustomConfigWindow()
+    {
+        InitializeComponent();
+
+        _config = AppHandler.Instance.Config;
+        btnCancel.Click += (s, e) => this.Close();
+        ViewModel = new CustomConfigViewModel(UpdateViewHandler);
+
+        this.WhenActivated(disposables =>
+        {
+            this.Bind(ViewModel, vm => vm.EnableCustomConfig4Ray, v => v.rayCustomConfigEnable.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.CustomConfig4Ray, v => v.rayCustomConfig.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.AddProxyOnly4Ray, v => v.togAddProxyProtocolOutboundOnly4Ray.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.ProxyDetour4Ray, v => v.txtProxyDetour4Ray.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.EnableCustomConfig4Singbox, v => v.sbCustomConfigEnable.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.CustomConfig4Singbox, v => v.sbCustomConfig.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.CustomTunConfig4Singbox, v => v.sbCustomTunConfig.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.AddProxyOnly4Singbox, v => v.togAddProxyProtocolOutboundOnly4Singbox.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.ProxyDetour4Singbox, v => v.txtProxyDetour4Singbox.Text).DisposeWith(disposables);
+
+            this.BindCommand(ViewModel, vm => vm.SaveCmd, v => v.btnSave).DisposeWith(disposables);
+        });
+    }
+
+    private async Task<bool> UpdateViewHandler(EViewAction action, object? obj)
+    {
+        switch (action)
+        {
+            case EViewAction.CloseWindow:
+                this.Close(true);
+                break;
+        }
+        return await Task.FromResult(true);
+    }
+}
diff --git a/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml b/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml
index af4ae529..bf36917a 100644
--- a/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml
+++ b/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml
@@ -72,6 +72,7 @@
                         <MenuItem x:Name="menuOptionSetting" Header="{x:Static resx:ResUI.menuOptionSetting}" />
                         <MenuItem x:Name="menuRoutingSetting" Header="{x:Static resx:ResUI.menuRoutingSetting}" />
                         <MenuItem x:Name="menuDNSSetting" Header="{x:Static resx:ResUI.menuDNSSetting}" />
+                        <MenuItem x:Name="menuCustomConfig" Header="{x:Static resx:ResUI.menuCustomConfig}" />
                         <MenuItem x:Name="menuGlobalHotkeySetting" Header="{x:Static resx:ResUI.menuGlobalHotkeySetting}" />
                         <Separator />
                         <MenuItem x:Name="menuRebootAsAdmin" Header="{x:Static resx:ResUI.menuRebootAsAdmin}" />
diff --git a/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml.cs b/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml.cs
index 2584310b..02924078 100644
--- a/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml.cs
@@ -100,6 +100,7 @@ public partial class MainWindow : WindowBase<MainWindowViewModel>
             this.BindCommand(ViewModel, vm => vm.OptionSettingCmd, v => v.menuOptionSetting).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.RoutingSettingCmd, v => v.menuRoutingSetting).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.DNSSettingCmd, v => v.menuDNSSetting).DisposeWith(disposables);
+            this.BindCommand(ViewModel, vm => vm.CustomConfigCmd, v => v.menuCustomConfig).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.GlobalHotkeySettingCmd, v => v.menuGlobalHotkeySetting).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.RebootAsAdminCmd, v => v.menuRebootAsAdmin).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.ClearServerStatisticsCmd, v => v.menuClearServerStatistics).DisposeWith(disposables);
@@ -190,6 +191,9 @@ public partial class MainWindow : WindowBase<MainWindowViewModel>
             case EViewAction.DNSSettingWindow:
                 return await new DNSSettingWindow().ShowDialog<bool>(this);
 
+            case EViewAction.CustomConfigWindow:
+                return await new CustomConfigWindow().ShowDialog<bool>(this);
+
             case EViewAction.RoutingSettingWindow:
                 return await new RoutingSettingWindow().ShowDialog<bool>(this);
 
diff --git a/v2rayN/v2rayN/Views/CustomConfigWindow.xaml b/v2rayN/v2rayN/Views/CustomConfigWindow.xaml
new file mode 100644
index 00000000..3ec9b725
--- /dev/null
+++ b/v2rayN/v2rayN/Views/CustomConfigWindow.xaml
@@ -0,0 +1,205 @@
+<base:WindowBase
+    x:Class="v2rayN.Views.CustomConfigWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:base="clr-namespace:v2rayN.Base"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:reactiveui="http://reactiveui.net"
+    xmlns:resx="clr-namespace:ServiceLib.Resx;assembly=ServiceLib"
+    xmlns:vms="clr-namespace:ServiceLib.ViewModels;assembly=ServiceLib"
+    Title="{x:Static resx:ResUI.menuCustomConfig}"
+    Width="1000"
+    Height="700"
+    x:TypeArguments="vms:CustomConfigViewModel"
+    ShowInTaskbar="False"
+    Style="{StaticResource WindowGlobal}"
+    WindowStartupLocation="CenterScreen"
+    mc:Ignorable="d">
+    <DockPanel Margin="{StaticResource Margin8}">
+        <StackPanel
+            Margin="{StaticResource Margin4}"
+            HorizontalAlignment="Center"
+            DockPanel.Dock="Bottom"
+            Orientation="Horizontal">
+            <Button
+                x:Name="btnSave"
+                Width="100"
+                Content="{x:Static resx:ResUI.TbConfirm}"
+                Cursor="Hand"
+                IsDefault="True"
+                Style="{StaticResource DefButton}" />
+            <Button
+                x:Name="btnCancel"
+                Width="100"
+                Margin="{StaticResource MarginLeftRight8}"
+                Content="{x:Static resx:ResUI.TbCancel}"
+                Cursor="Hand"
+                IsCancel="true"
+                Style="{StaticResource DefButton}" />
+        </StackPanel>
+
+        <TabControl HorizontalContentAlignment="Left">
+            <TabItem HorizontalAlignment="Left" Header="{x:Static resx:ResUI.TbRayCustomConfig}">
+                <DockPanel Margin="{StaticResource Margin8}">
+                    <Grid DockPanel.Dock="Top">
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto" />
+                            <RowDefinition Height="Auto" />
+                        </Grid.RowDefinitions>
+
+                        <StackPanel Grid.Row="0" Orientation="Horizontal">
+                            <TextBlock
+                                Grid.Row="0"
+                                Margin="{StaticResource Margin8}"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource ToolbarTextBlock}"
+                                Text="{x:Static resx:ResUI.TbRayCustomConfigDesc}" />
+                        </StackPanel>
+
+                        <StackPanel Grid.Row="1" Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin8}"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource ToolbarTextBlock}"
+                                Text="{x:Static resx:ResUI.TbCustomConfigEnable}" />
+                            <ToggleButton
+                                x:Name="rayCustomConfigEnable"
+                                Margin="{StaticResource Margin8}"
+                                HorizontalAlignment="Left" />
+                        </StackPanel>
+                    </Grid>
+
+                    <WrapPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin8}"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource ToolbarTextBlock}"
+                                Text="{x:Static resx:ResUI.TbAddProxyProtocolOutboundOnly}" />
+                            <ToggleButton
+                                x:Name="togAddProxyProtocolOutboundOnly4Ray"
+                                Margin="{StaticResource Margin8}"
+                                HorizontalAlignment="Left" />
+                        </StackPanel>
+
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin8}"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource ToolbarTextBlock}"
+                                Text="{x:Static resx:ResUI.TbSetUpstreamProxyDetour}" />
+                            <TextBox
+                                x:Name="txtProxyDetour4Ray"
+                                Width="200"
+                                Margin="{StaticResource Margin8}"
+                                Style="{StaticResource DefTextBox}" />
+                        </StackPanel>
+                    </WrapPanel>
+
+                    <TextBox
+                        x:Name="rayCustomConfig"
+                        Margin="{StaticResource Margin8}"
+                        VerticalAlignment="Stretch"
+                        materialDesign:HintAssist.Hint="xray json config"
+                        AcceptsReturn="True"
+                        BorderThickness="1"
+                        Style="{StaticResource MaterialDesignOutlinedTextBox}"
+                        TextWrapping="Wrap"
+                        VerticalScrollBarVisibility="Auto" />
+                </DockPanel>
+            </TabItem>
+            <TabItem HorizontalAlignment="Left" Header="{x:Static resx:ResUI.TbCustomConfigSingbox}">
+                <DockPanel Margin="{StaticResource Margin8}">
+                    <Grid DockPanel.Dock="Top">
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto" />
+                            <RowDefinition Height="Auto" />
+                        </Grid.RowDefinitions>
+
+                        <StackPanel Grid.Row="0" Orientation="Horizontal">
+                            <TextBlock
+                                Grid.Row="0"
+                                Margin="{StaticResource Margin8}"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource ToolbarTextBlock}"
+                                Text="{x:Static resx:ResUI.TbSBCustomConfigDesc}" />
+                        </StackPanel>
+
+                        <StackPanel Grid.Row="1" Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin8}"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource ToolbarTextBlock}"
+                                Text="{x:Static resx:ResUI.TbCustomConfigEnable}" />
+                            <ToggleButton
+                                x:Name="sbCustomConfigEnable"
+                                Margin="{StaticResource Margin8}"
+                                HorizontalAlignment="Left" />
+                        </StackPanel>
+                    </Grid>
+
+                    <WrapPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin8}"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource ToolbarTextBlock}"
+                                Text="{x:Static resx:ResUI.TbAddProxyProtocolOutboundOnly}" />
+                            <ToggleButton
+                                x:Name="togAddProxyProtocolOutboundOnly4Singbox"
+                                Margin="{StaticResource Margin8}"
+                                HorizontalAlignment="Left" />
+                        </StackPanel>
+
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock
+                                Margin="{StaticResource Margin8}"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource ToolbarTextBlock}"
+                                Text="{x:Static resx:ResUI.TbSetUpstreamProxyDetour}" />
+                            <TextBox
+                                x:Name="txtProxyDetour4Singbox"
+                                Width="200"
+                                Margin="{StaticResource Margin8}"
+                                Style="{StaticResource DefTextBox}" />
+                        </StackPanel>
+                    </WrapPanel>
+
+                    <Grid Margin="{StaticResource Margin8}">
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="1*" />
+                            <ColumnDefinition Width="10" />
+                            <ColumnDefinition Width="1*" />
+                        </Grid.ColumnDefinitions>
+
+                        <TextBox
+                            x:Name="sbCustomConfig"
+                            Grid.Column="0"
+                            VerticalAlignment="Stretch"
+                            materialDesign:HintAssist.Hint="sing-box json config"
+                            AcceptsReturn="True"
+                            BorderThickness="1"
+                            Style="{StaticResource MaterialDesignOutlinedTextBox}"
+                            TextWrapping="Wrap"
+                            VerticalScrollBarVisibility="Auto" />
+
+                        <GridSplitter Grid.Column="1" HorizontalAlignment="Stretch" />
+
+                        <TextBox
+                            x:Name="sbCustomTunConfig"
+                            Grid.Column="2"
+                            VerticalAlignment="Stretch"
+                            materialDesign:HintAssist.Hint="sing-box json tun config"
+                            AcceptsReturn="True"
+                            BorderThickness="1"
+                            Style="{StaticResource MaterialDesignOutlinedTextBox}"
+                            TextWrapping="Wrap"
+                            VerticalScrollBarVisibility="Auto" />
+                    </Grid>
+                </DockPanel>
+            </TabItem>
+        </TabControl>
+    </DockPanel>
+</base:WindowBase>
diff --git a/v2rayN/v2rayN/Views/CustomConfigWindow.xaml.cs b/v2rayN/v2rayN/Views/CustomConfigWindow.xaml.cs
new file mode 100644
index 00000000..6fe48dc9
--- /dev/null
+++ b/v2rayN/v2rayN/Views/CustomConfigWindow.xaml.cs
@@ -0,0 +1,47 @@
+using System.Reactive.Disposables;
+using System.Windows;
+using ReactiveUI;
+
+namespace v2rayN.Views;
+
+public partial class CustomConfigWindow
+{
+    private static Config _config;
+
+    public CustomConfigWindow()
+    {
+        InitializeComponent();
+
+        this.Owner = Application.Current.MainWindow;
+        _config = AppHandler.Instance.Config;
+
+        ViewModel = new CustomConfigViewModel(UpdateViewHandler);
+
+        this.WhenActivated(disposables =>
+        {
+            this.Bind(ViewModel, vm => vm.EnableCustomConfig4Ray, v => v.rayCustomConfigEnable.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.CustomConfig4Ray, v => v.rayCustomConfig.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.AddProxyOnly4Ray, v => v.togAddProxyProtocolOutboundOnly4Ray.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.ProxyDetour4Ray, v => v.txtProxyDetour4Ray.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.EnableCustomConfig4Singbox, v => v.sbCustomConfigEnable.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.CustomConfig4Singbox, v => v.sbCustomConfig.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.CustomTunConfig4Singbox, v => v.sbCustomTunConfig.Text).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.AddProxyOnly4Singbox, v => v.togAddProxyProtocolOutboundOnly4Singbox.IsChecked).DisposeWith(disposables);
+            this.Bind(ViewModel, vm => vm.ProxyDetour4Singbox, v => v.txtProxyDetour4Singbox.Text).DisposeWith(disposables);
+
+            this.BindCommand(ViewModel, vm => vm.SaveCmd, v => v.btnSave).DisposeWith(disposables);
+        });
+        WindowsUtils.SetDarkBorder(this, AppHandler.Instance.Config.UiItem.CurrentTheme);
+    }
+
+    private async Task<bool> UpdateViewHandler(EViewAction action, object? obj)
+    {
+        switch (action)
+        {
+            case EViewAction.CloseWindow:
+                this.DialogResult = true;
+                break;
+        }
+        return await Task.FromResult(true);
+    }
+}
diff --git a/v2rayN/v2rayN/Views/MainWindow.xaml b/v2rayN/v2rayN/Views/MainWindow.xaml
index 0b8c30b3..2b36f35b 100644
--- a/v2rayN/v2rayN/Views/MainWindow.xaml
+++ b/v2rayN/v2rayN/Views/MainWindow.xaml
@@ -173,6 +173,10 @@
                                     x:Name="menuDNSSetting"
                                     Height="{StaticResource MenuItemHeight}"
                                     Header="{x:Static resx:ResUI.menuDNSSetting}" />
+                                <MenuItem
+                                    x:Name="menuCustomConfig"
+                                    Height="{StaticResource MenuItemHeight}"
+                                    Header="{x:Static resx:ResUI.menuCustomConfig}" />
                                 <MenuItem
                                     x:Name="menuGlobalHotkeySetting"
                                     Height="{StaticResource MenuItemHeight}"
diff --git a/v2rayN/v2rayN/Views/MainWindow.xaml.cs b/v2rayN/v2rayN/Views/MainWindow.xaml.cs
index 08bdd90b..a3177ae5 100644
--- a/v2rayN/v2rayN/Views/MainWindow.xaml.cs
+++ b/v2rayN/v2rayN/Views/MainWindow.xaml.cs
@@ -97,6 +97,7 @@ public partial class MainWindow
             this.BindCommand(ViewModel, vm => vm.OptionSettingCmd, v => v.menuOptionSetting).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.RoutingSettingCmd, v => v.menuRoutingSetting).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.DNSSettingCmd, v => v.menuDNSSetting).DisposeWith(disposables);
+            this.BindCommand(ViewModel, vm => vm.CustomConfigCmd, v => v.menuCustomConfig).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.GlobalHotkeySettingCmd, v => v.menuGlobalHotkeySetting).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.RebootAsAdminCmd, v => v.menuRebootAsAdmin).DisposeWith(disposables);
             this.BindCommand(ViewModel, vm => vm.ClearServerStatisticsCmd, v => v.menuClearServerStatistics).DisposeWith(disposables);
@@ -186,6 +187,9 @@ public partial class MainWindow
             case EViewAction.OptionSettingWindow:
                 return (new OptionSettingWindow().ShowDialog() ?? false);
 
+            case EViewAction.CustomConfigWindow:
+                return (new CustomConfigWindow().ShowDialog() ?? false);
+
             case EViewAction.GlobalHotkeySettingWindow:
                 return (new GlobalHotkeySettingWindow().ShowDialog() ?? false);