diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index ece3bf76802..14c364c3b29 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -4,9 +4,9 @@ import { onMounted, onBeforeUnmount, watch } from 'vue'
 import Toast from '@/components/common/Toast.vue'
 import NavigationProgress from '@/components/common/NavigationProgress.vue'
 import AdminComplianceDialog from '@/components/admin/AdminComplianceDialog.vue'
-import { resolveDocumentTitle } from '@/router/title'
+import { resolveRouteDocumentTitle } from '@/router/title'
 import AnnouncementPopup from '@/components/common/AnnouncementPopup.vue'
-import { useAppStore, useAuthStore, useSubscriptionStore, useAnnouncementStore, useAdminComplianceStore } from '@/stores'
+import { useAppStore, useAuthStore, useSubscriptionStore, useAnnouncementStore, useAdminComplianceStore, useAdminSettingsStore } from '@/stores'
 import { getSetupStatus } from '@/api/setup'
 
 const router = useRouter()
@@ -16,6 +16,15 @@ const authStore = useAuthStore()
 const subscriptionStore = useSubscriptionStore()
 const announcementStore = useAnnouncementStore()
 const adminComplianceStore = useAdminComplianceStore()
+const adminSettingsStore = useAdminSettingsStore()
+
+function updateDocumentTitle() {
+  const customMenuItems = [
+    ...(appStore.cachedPublicSettings?.custom_menu_items ?? []),
+    ...(authStore.isAdmin ? adminSettingsStore.customMenuItems : []),
+  ]
+  document.title = resolveRouteDocumentTitle(route, appStore.siteName, customMenuItems)
+}
 
 /**
  * Update favicon dynamically
@@ -44,6 +53,20 @@ watch(
   { immediate: true }
 )
 
+watch(
+  [
+    () => route.fullPath,
+    () => route.meta.title,
+    () => route.meta.titleKey,
+    () => appStore.siteName,
+    () => appStore.cachedPublicSettings?.custom_menu_items,
+    () => authStore.isAdmin,
+    () => adminSettingsStore.customMenuItems,
+  ],
+  updateDocumentTitle,
+  { deep: true }
+)
+
 // Watch for authentication state and manage subscription data + announcements
 function onVisibilityChange() {
   if (document.visibilityState === 'visible' && authStore.isAuthenticated) {
@@ -123,8 +146,8 @@ onMounted(async () => {
   // Load public settings into appStore (will be cached for other components)
   await appStore.fetchPublicSettings()
 
-  // Re-resolve document title now that siteName is available
-  document.title = resolveDocumentTitle(route.meta.title, appStore.siteName, route.meta.titleKey as string)
+  // Re-resolve document title now that site settings are available
+  updateDocumentTitle()
 })
 </script>
 
diff --git a/frontend/src/i18n/index.ts b/frontend/src/i18n/index.ts
index 5dab65e8097..79bf77e8bad 100644
--- a/frontend/src/i18n/index.ts
+++ b/frontend/src/i18n/index.ts
@@ -70,12 +70,20 @@ export async function setLocale(locale: string): Promise<void> {
   document.documentElement.setAttribute('lang', locale)
 
   // 同步更新浏览器页签标题，使其跟随语言切换
-  const { resolveDocumentTitle } = await import('@/router/title')
+  const { resolveRouteDocumentTitle } = await import('@/router/title')
   const { default: router } = await import('@/router')
   const { useAppStore } = await import('@/stores/app')
+  const { useAuthStore } = await import('@/stores/auth')
+  const { useAdminSettingsStore } = await import('@/stores/adminSettings')
   const route = router.currentRoute.value
   const appStore = useAppStore()
-  document.title = resolveDocumentTitle(route.meta.title, appStore.siteName, route.meta.titleKey as string)
+  const authStore = useAuthStore()
+  const adminSettingsStore = useAdminSettingsStore()
+  const customMenuItems = [
+    ...(appStore.cachedPublicSettings?.custom_menu_items ?? []),
+    ...(authStore.isAdmin ? adminSettingsStore.customMenuItems : []),
+  ]
+  document.title = resolveRouteDocumentTitle(route, appStore.siteName, customMenuItems)
 }
 
 export function getLocale(): LocaleCode {
diff --git a/frontend/src/router/__tests__/title.spec.ts b/frontend/src/router/__tests__/title.spec.ts
index 3a89283748a..7cd3812b65c 100644
--- a/frontend/src/router/__tests__/title.spec.ts
+++ b/frontend/src/router/__tests__/title.spec.ts
@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { resolveDocumentTitle } from '@/router/title'
+import { resolveDocumentTitle, resolveRouteDocumentTitle } from '@/router/title'
 
 describe('resolveDocumentTitle', () => {
   it('路由存在标题时，使用“路由标题 - 站点名”格式', () => {
@@ -23,3 +23,27 @@ describe('resolveDocumentTitle', () => {
     expect(after).toBe('Admin Dashboard - Beta')
   })
 })
+
+describe('resolveRouteDocumentTitle', () => {
+  it('自定义页面菜单加载后，使用菜单名称作为标题', () => {
+    const route = {
+      name: 'CustomPage',
+      params: { id: 'scheduler' },
+      meta: {
+        title: 'Custom Page'
+      }
+    }
+
+    expect(resolveRouteDocumentTitle(route, 'EzouAPI')).toBe('Custom Page - EzouAPI')
+    expect(resolveRouteDocumentTitle(route, 'EzouAPI', [
+      {
+        id: 'scheduler',
+        label: '账号调度器',
+        icon_svg: '',
+        url: 'https://example.com',
+        visibility: 'admin',
+        sort_order: 0
+      }
+    ])).toBe('账号调度器 - EzouAPI')
+  })
+})
diff --git a/frontend/src/router/index.ts b/frontend/src/router/index.ts
index bcc5f42197e..8721efd70a0 100644
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -12,7 +12,7 @@ import { useNavigationLoadingState } from '@/composables/useNavigationLoading'
 import { useRoutePrefetch } from '@/composables/useRoutePrefetch'
 import { getSetupStatus } from '@/api/setup'
 import { resolveCompletedSetupRedirectPath } from './setupRedirect'
-import { resolveDocumentTitle } from './title'
+import { resolveRouteDocumentTitle } from './title'
 
 /**
  * Route definitions with lazy loading
@@ -732,22 +732,12 @@ router.beforeEach(async (to, _from, next) => {
 
   // Set page title
   const appStore = useAppStore()
-  // For custom pages, use menu item label as document title
-  if (to.name === 'CustomPage') {
-    const id = to.params.id as string
-    const publicItems = appStore.cachedPublicSettings?.custom_menu_items ?? []
-    const adminSettingsStore = useAdminSettingsStore()
-    const menuItem = publicItems.find((item) => item.id === id)
-      ?? (authStore.isAdmin ? adminSettingsStore.customMenuItems.find((item) => item.id === id) : undefined)
-    if (menuItem?.label) {
-      const siteName = appStore.siteName || 'Sub2API'
-      document.title = `${menuItem.label} - ${siteName}`
-    } else {
-      document.title = resolveDocumentTitle(to.meta.title, appStore.siteName, to.meta.titleKey as string)
-    }
-  } else {
-    document.title = resolveDocumentTitle(to.meta.title, appStore.siteName, to.meta.titleKey as string)
-  }
+  const adminSettingsStore = useAdminSettingsStore()
+  const customMenuItems = [
+    ...(appStore.cachedPublicSettings?.custom_menu_items ?? []),
+    ...(authStore.isAdmin ? adminSettingsStore.customMenuItems : []),
+  ]
+  document.title = resolveRouteDocumentTitle(to, appStore.siteName, customMenuItems)
 
   // Check if route requires authentication
   const requiresAuth = to.meta.requiresAuth !== false // Default to true
diff --git a/frontend/src/router/title.ts b/frontend/src/router/title.ts
index 89ec9276a64..be5cf9d39fc 100644
--- a/frontend/src/router/title.ts
+++ b/frontend/src/router/title.ts
@@ -1,4 +1,6 @@
 import { i18n } from '@/i18n'
+import type { RouteLocationNormalizedLoaded } from 'vue-router'
+import type { CustomMenuItem } from '@/types'
 
 /**
  * 统一生成页面标题，避免多处写入 document.title 产生覆盖冲突。
@@ -20,3 +22,17 @@ export function resolveDocumentTitle(routeTitle: unknown, siteName?: string, tit
 
   return normalizedSiteName
 }
+
+export function resolveRouteDocumentTitle(
+  route: Pick<RouteLocationNormalizedLoaded, 'name' | 'params' | 'meta'>,
+  siteName: string | undefined,
+  customMenuItems: CustomMenuItem[] = [],
+): string {
+  const id = typeof route.params.id === 'string' ? route.params.id : ''
+  const menuItem = route.name === 'CustomPage' && id
+    ? customMenuItems.find((item) => item.id === id)
+    : undefined
+  const menuTitle = menuItem?.label.trim()
+
+  return resolveDocumentTitle(menuTitle || route.meta.title, siteName, menuTitle ? undefined : route.meta.titleKey as string)
+}