diff --git a/web/src/layouts/MainLayout.vue b/web/src/layouts/MainLayout.vue
index 25875c5..f16a4be 100644
--- a/web/src/layouts/MainLayout.vue
+++ b/web/src/layouts/MainLayout.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { ref, onMounted } from 'vue'
 import { RouterLink, RouterView, useRoute } from 'vue-router'
+import { resetAuthCache } from '@/router'
 import { LayoutDashboard, ListTodo, FileCode, Settings, LogOut, ScrollText, Terminal, Variable, KeyRound, Package, Menu, X } from 'lucide-vue-next'
 import { Button } from '@/components/ui/button'
 import ThemeToggle from '@/components/ThemeToggle.vue'
@@ -42,6 +43,7 @@ async function logout() {
   } catch {
     // 忽略错误
   }
+  resetAuthCache()
   window.location.href = '/login'
 }
 
diff --git a/web/src/router/index.ts b/web/src/router/index.ts
index fcfe97f..183583d 100644
--- a/web/src/router/index.ts
+++ b/web/src/router/index.ts
@@ -1,6 +1,25 @@
 import { createRouter, createWebHistory } from 'vue-router'
 import { checkAuth } from '@/api'
 
+// 缓存认证状态，避免每次路由跳转都请求
+let authChecked = false
+let isAuth = false
+
+async function getAuthStatus(force = false): Promise<boolean> {
+  if (!force && authChecked) {
+    return isAuth
+  }
+  isAuth = await checkAuth()
+  authChecked = true
+  return isAuth
+}
+
+// 重置认证状态（登录/登出时调用）
+export function resetAuthCache() {
+  authChecked = false
+  isAuth = false
+}
+
 const router = createRouter({
   history: createWebHistory(),
   routes: [
@@ -31,7 +50,9 @@ const router = createRouter({
 
 // 路由守卫
 router.beforeEach(async (to, _from, next) => {
-  const isAuthenticated = await checkAuth()
+  // 首次访问或访问登录页时强制检查
+  const forceCheck = !authChecked || to.path === '/login'
+  const isAuthenticated = await getAuthStatus(forceCheck)
   
   // 检查是否需要认证
   if (to.matched.some(record => record.meta.requiresAuth)) {
diff --git a/web/src/views/login/Login.vue b/web/src/views/login/Login.vue
index bae555a..40e025b 100644
--- a/web/src/views/login/Login.vue
+++ b/web/src/views/login/Login.vue
@@ -7,6 +7,7 @@ import { Label } from '@/components/ui/label'
 import ThemeToggle from '@/components/ThemeToggle.vue'
 import { api } from '@/api'
 import { toast } from 'vue-sonner'
+import { resetAuthCache } from '@/router'
 
 const router = useRouter()
 const username = ref('')
@@ -46,6 +47,7 @@ async function handleLogin() {
   loading.value = true
   try {
     await api.auth.login({ username: username.value, password: password.value })
+    resetAuthCache() // 重置认证缓存
     toast.success('登录成功')
     router.push('/')
   } catch {