diff --git a/.gitignore b/.gitignore
index 6ea141728..7af8aae5c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 # Ignore editor and IDE settings
 .idea/
 .vscode/
+.cursor/
 .claude/
 .cache/
 .sync*
diff --git a/frontend/src/pages/xray/XrayPage.tsx b/frontend/src/pages/xray/XrayPage.tsx
index b11dc4ff3..d2fb7afd6 100644
--- a/frontend/src/pages/xray/XrayPage.tsx
+++ b/frontend/src/pages/xray/XrayPage.tsx
@@ -29,6 +29,7 @@ import { JsonEditor } from '@/components/form';
 import { setMessageInstance } from '@/utils/messageBus';
 
 import { BasicsTab } from './basics';
+import { propagateOutboundTagRename } from './basics/helpers';
 import { RoutingTab } from './routing';
 import { OutboundsTab } from './outbounds';
 import { BalancersTab } from './balancers';
@@ -118,11 +119,8 @@ export default function XrayPage() {
     mutate((tt) => {
       if (!tt.outbounds || payload.index < 0) return;
       tt.outbounds[payload.index] = payload.outbound as never;
-      if (payload.oldTag && payload.newTag && payload.oldTag !== payload.newTag) {
-        const rules = tt.routing?.rules || [];
-        for (const r of rules) {
-          if (r?.outboundTag === payload.oldTag) r.outboundTag = payload.newTag;
-        }
+      if (payload.oldTag && payload.newTag) {
+        propagateOutboundTagRename(tt, payload.oldTag, payload.newTag);
       }
     });
   }
diff --git a/frontend/src/pages/xray/basics/helpers.ts b/frontend/src/pages/xray/basics/helpers.ts
index eb400da1f..48df3e0c9 100644
--- a/frontend/src/pages/xray/basics/helpers.ts
+++ b/frontend/src/pages/xray/basics/helpers.ts
@@ -54,3 +54,36 @@ export function syncOutbound(t: XraySettingsValue, tag: string, settings: Record
   if (!haveRules && idx > 0) t.outbounds.splice(idx, 1);
   if (haveRules && idx < 0) t.outbounds.push(settings as never);
 }
+
+export function propagateOutboundTagRename(
+  t: XraySettingsValue,
+  oldTag: string,
+  newTag: string,
+): void {
+  if (!oldTag || !newTag || oldTag === newTag) return;
+
+  const rules = t.routing?.rules;
+  if (Array.isArray(rules)) {
+    for (const rule of rules) {
+      if (rule?.outboundTag === oldTag) rule.outboundTag = newTag;
+    }
+  }
+
+  const balancers = t.routing?.balancers;
+  if (Array.isArray(balancers)) {
+    for (const balancer of balancers) {
+      if (balancer?.fallbackTag === oldTag) balancer.fallbackTag = newTag;
+      if (Array.isArray(balancer?.selector)) {
+        balancer.selector = balancer.selector.map((sel) => (sel === oldTag ? newTag : sel));
+      }
+    }
+  }
+
+  if (Array.isArray(t.outbounds)) {
+    for (const outbound of t.outbounds) {
+      const sockopt = (outbound as { streamSettings?: { sockopt?: { dialerProxy?: string } } })
+        ?.streamSettings?.sockopt;
+      if (sockopt?.dialerProxy === oldTag) sockopt.dialerProxy = newTag;
+    }
+  }
+}
diff --git a/frontend/src/pages/xray/outbounds/OutboundsTab.tsx b/frontend/src/pages/xray/outbounds/OutboundsTab.tsx
index be8f4c9c6..ae932c37f 100644
--- a/frontend/src/pages/xray/outbounds/OutboundsTab.tsx
+++ b/frontend/src/pages/xray/outbounds/OutboundsTab.tsx
@@ -38,6 +38,7 @@ import {
 import { HttpUtil } from '@/utils';
 
 import OutboundFormModal from './OutboundFormModal';
+import { propagateOutboundTagRename } from '../basics/helpers';
 import type { XraySettingsValue, SetTemplate, OutboundTestState, OutboundTrafficRow } from '@/hooks/useXraySetting';
 import './OutboundsTab.css';
 
@@ -172,11 +173,16 @@ export default function OutboundsTab({
   function onConfirm(outbound: Record<string, unknown>) {
     mutate((tt) => {
       if (!Array.isArray(tt.outbounds)) tt.outbounds = [];
+      const newTag = typeof outbound.tag === 'string' ? outbound.tag : '';
       if (editingIndex == null) {
-        if (!outbound.tag) return;
+        if (!newTag) return;
         tt.outbounds.push(outbound as never);
       } else {
+        const oldTag = tt.outbounds[editingIndex]?.tag;
         tt.outbounds[editingIndex] = outbound as never;
+        if (oldTag && newTag && oldTag !== newTag) {
+          propagateOutboundTagRename(tt, oldTag, newTag);
+        }
       }
     });
     setModalOpen(false);
diff --git a/frontend/src/test/outbound-tag-rename.test.ts b/frontend/src/test/outbound-tag-rename.test.ts
new file mode 100644
index 000000000..fbf7ff6c3
--- /dev/null
+++ b/frontend/src/test/outbound-tag-rename.test.ts
@@ -0,0 +1,61 @@
+import { describe, it, expect } from 'vitest';
+
+import type { XraySettingsValue } from '@/hooks/useXraySetting';
+import { propagateOutboundTagRename } from '@/pages/xray/basics/helpers';
+
+function baseTemplate(): XraySettingsValue {
+  return {
+    outbounds: [
+      { tag: 'To-External-Proxy', protocol: 'vless' },
+      { tag: 'direct', protocol: 'freedom' },
+    ],
+    routing: {
+      rules: [
+        {
+          type: 'field',
+          inboundTag: ['iran-in'],
+          outboundTag: 'To-External-Proxy',
+        },
+      ],
+      balancers: [
+        {
+          tag: 'lb-1',
+          selector: ['To-External-Proxy', 'direct'],
+          fallbackTag: 'To-External-Proxy',
+        },
+      ],
+    },
+  } as XraySettingsValue;
+}
+
+describe('propagateOutboundTagRename', () => {
+  it('updates routing rule outboundTag when outbound is renamed', () => {
+    const t = baseTemplate();
+    propagateOutboundTagRename(t, 'To-External-Proxy', 'external-vps');
+    expect(t.routing?.rules?.[0]?.outboundTag).toBe('external-vps');
+  });
+
+  it('updates balancer selector and fallbackTag', () => {
+    const t = baseTemplate();
+    propagateOutboundTagRename(t, 'To-External-Proxy', 'external-vps');
+    expect(t.routing?.balancers?.[0]?.selector).toEqual(['external-vps', 'direct']);
+    expect(t.routing?.balancers?.[0]?.fallbackTag).toBe('external-vps');
+  });
+
+  it('updates sockopt dialerProxy references in other outbounds', () => {
+    const t = baseTemplate();
+    (t.outbounds![1] as { streamSettings?: { sockopt?: { dialerProxy?: string } } }).streamSettings = {
+      sockopt: { dialerProxy: 'To-External-Proxy' },
+    };
+    propagateOutboundTagRename(t, 'To-External-Proxy', 'external-vps');
+    const dialerProxy = (t.outbounds![1] as { streamSettings?: { sockopt?: { dialerProxy?: string } } })
+      .streamSettings?.sockopt?.dialerProxy;
+    expect(dialerProxy).toBe('external-vps');
+  });
+
+  it('is a no-op when old and new tags are equal', () => {
+    const t = baseTemplate();
+    propagateOutboundTagRename(t, 'To-External-Proxy', 'To-External-Proxy');
+    expect(t.routing?.rules?.[0]?.outboundTag).toBe('To-External-Proxy');
+  });
+});
diff --git a/frontend/src/test/setup.components.ts b/frontend/src/test/setup.components.ts
index c2f6e0a64..62f1a347f 100644
--- a/frontend/src/test/setup.components.ts
+++ b/frontend/src/test/setup.components.ts
@@ -74,3 +74,19 @@ afterEach(async () => {
     await new Promise((resolve) => setTimeout(resolve, 0));
   }
 });
+
+import { HttpUtil } from '@/utils';
+
+vi.mock('axios', () => {
+  return {
+    default: {
+      get: vi.fn().mockResolvedValue({ data: { success: true, obj: {} } }),
+      post: vi.fn().mockResolvedValue({ data: { success: true, obj: {} } }),
+    }
+  };
+});
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+vi.spyOn(HttpUtil, 'post').mockResolvedValue({ success: true, obj: {} } as any);
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+vi.spyOn(HttpUtil, 'get').mockResolvedValue({ success: true, obj: {} } as any);