diff --git a/src/app/api/admin/user-devices/route.ts b/src/app/api/admin/user-devices/route.ts
index 793394b..e0c6373 100644
--- a/src/app/api/admin/user-devices/route.ts
+++ b/src/app/api/admin/user-devices/route.ts
@@ -2,6 +2,7 @@
 
 import { NextRequest, NextResponse } from 'next/server';
 
+import { invalidateDeviceAccessToken } from '@/lib/access-token-invalidation';
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getConfig } from '@/lib/config';
 import { db, getStorage } from '@/lib/db';
@@ -156,6 +157,7 @@ export async function DELETE(request: NextRequest) {
       );
     }
 
+    invalidateDeviceAccessToken(targetUsername, tokenId);
     await revokeRefreshToken(targetUsername, tokenId);
     const storage = getStorage();
     await storage.deletePushSubscriptionsByTokenId?.(targetUsername, tokenId);
diff --git a/src/app/api/admin/user/route.ts b/src/app/api/admin/user/route.ts
index b5c3c37..59e03e5 100644
--- a/src/app/api/admin/user/route.ts
+++ b/src/app/api/admin/user/route.ts
@@ -2,14 +2,29 @@
 
 import { NextRequest, NextResponse } from 'next/server';
 
+import { invalidateUserAccessTokens } from '@/lib/access-token-invalidation';
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getConfig } from '@/lib/config';
-import { db } from '@/lib/db';
+import { db, getStorage } from '@/lib/db';
 import { sanitizeFeaturePermissions } from '@/lib/feature-permissions';
+import { revokeAllRefreshTokens } from '@/lib/refresh-token';
 
 export const runtime = 'nodejs';
 
 // 支持的操作类型
+
+async function terminateUserSessions(username: string, reason: string): Promise<void> {
+  try {
+    invalidateUserAccessTokens(username);
+    await revokeAllRefreshTokens(username);
+    const storage = getStorage();
+    await storage.deleteAllPushSubscriptions?.(username);
+    console.log(`Terminated all sessions for ${username}: ${reason}`);
+  } catch (error) {
+    console.error(`Failed to terminate sessions for ${username}:`, error);
+  }
+}
+
 const ACTIONS = [
   'add',
   'ban',
@@ -194,6 +209,7 @@ export async function POST(request: NextRequest) {
 
         // 只更新V2存储
         await db.updateUserInfoV2(targetUsername!, { banned: true });
+        await terminateUserSessions(targetUsername!, 'user banned');
         break;
       }
       case 'unban': {
@@ -262,6 +278,7 @@ export async function POST(request: NextRequest) {
 
         // 只更新V2存储
         await db.updateUserInfoV2(targetUsername!, { role: 'user' });
+        await terminateUserSessions(targetUsername!, 'admin role revoked');
         break;
       }
       case 'changePassword': {
@@ -296,6 +313,7 @@ export async function POST(request: NextRequest) {
 
         // 使用新版本修改密码（SHA256加密）
         await db.changePasswordV2(targetUsername!, targetPassword);
+        await terminateUserSessions(targetUsername!, 'password changed by admin');
         break;
       }
       case 'deleteUser': {
@@ -321,7 +339,8 @@ export async function POST(request: NextRequest) {
           );
         }
 
-        // 只删除V2存储中的用户
+        // 先终止目标用户所有会话，再删除V2存储中的用户
+        await terminateUserSessions(targetUsername!, 'user deleted');
         await db.deleteUserV2(targetUsername!);
 
         break;
diff --git a/src/app/api/auth/devices/route.ts b/src/app/api/auth/devices/route.ts
index a4e966f..e0c9143 100644
--- a/src/app/api/auth/devices/route.ts
+++ b/src/app/api/auth/devices/route.ts
@@ -2,6 +2,7 @@
 
 import { NextRequest, NextResponse } from 'next/server';
 
+import { invalidateDeviceAccessToken, invalidateUserAccessTokens } from '@/lib/access-token-invalidation';
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getStorage } from '@/lib/db';
 import {
@@ -51,6 +52,7 @@ export async function DELETE(request: NextRequest) {
       return NextResponse.json({ error: 'Token ID required' }, { status: 400 });
     }
 
+    invalidateDeviceAccessToken(authInfo.username, tokenId);
     await revokeRefreshToken(authInfo.username, tokenId);
     const storage = getStorage();
     await storage.deletePushSubscriptionsByTokenId?.(authInfo.username, tokenId);
@@ -71,6 +73,7 @@ export async function POST(request: NextRequest) {
   }
 
   try {
+    invalidateUserAccessTokens(authInfo.username);
     await revokeAllRefreshTokens(authInfo.username);
     const storage = getStorage();
     await storage.deleteAllPushSubscriptions?.(authInfo.username);
diff --git a/src/app/api/auth/refresh/route.ts b/src/app/api/auth/refresh/route.ts
index d0f2dfe..404144d 100644
--- a/src/app/api/auth/refresh/route.ts
+++ b/src/app/api/auth/refresh/route.ts
@@ -2,6 +2,7 @@
 import { NextRequest, NextResponse } from 'next/server';
 
 import { getAuthInfoFromCookie, parseAuthInfo } from '@/lib/auth';
+import { db } from '@/lib/db';
 import { refreshAccessToken } from '@/lib/middleware-auth';
 import { TOKEN_CONFIG } from '@/lib/refresh-token';
 
@@ -73,6 +74,26 @@ export async function POST(request: NextRequest) {
 
   const now = Date.now();
 
+  if (authInfo.username === process.env.USERNAME) {
+    if (authInfo.role !== 'owner') {
+      return NextResponse.json({ error: 'Role changed' }, { status: 401 });
+    }
+  } else {
+    const userInfo = await db.getUserInfoV2(authInfo.username);
+
+    if (!userInfo) {
+      return NextResponse.json({ error: 'User not found' }, { status: 401 });
+    }
+
+    if (userInfo.banned) {
+      return NextResponse.json({ error: 'User banned' }, { status: 403 });
+    }
+
+    if (userInfo.role !== authInfo.role) {
+      return NextResponse.json({ error: 'Role changed' }, { status: 401 });
+    }
+  }
+
   // 只检查 Refresh Token 是否过期
   if (now >= authInfo.refreshExpires) {
     return NextResponse.json(
diff --git a/src/app/api/change-password/route.ts b/src/app/api/change-password/route.ts
index 82baf50..631a04c 100644
--- a/src/app/api/change-password/route.ts
+++ b/src/app/api/change-password/route.ts
@@ -2,6 +2,7 @@
 
 import { NextRequest, NextResponse } from 'next/server';
 
+import { invalidateDeviceAccessToken } from '@/lib/access-token-invalidation';
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getStorage } from '@/lib/db';
 import { db } from '@/lib/db';
@@ -59,6 +60,7 @@ export async function POST(request: NextRequest) {
       // 撤销所有非当前设备的 token
       for (const device of devices) {
         if (device.tokenId !== currentTokenId) {
+          invalidateDeviceAccessToken(username, device.tokenId);
           await revokeRefreshToken(username, device.tokenId);
           await storage.deletePushSubscriptionsByTokenId?.(username, device.tokenId);
           console.log(`Revoked token ${device.tokenId} for ${username} after password change`);
diff --git a/src/app/api/logout/route.ts b/src/app/api/logout/route.ts
index 0d46d18..48ab7f1 100644
--- a/src/app/api/logout/route.ts
+++ b/src/app/api/logout/route.ts
@@ -1,5 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server';
 
+import { invalidateDeviceAccessToken } from '@/lib/access-token-invalidation';
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getStorage } from '@/lib/db';
 import { revokeRefreshToken } from '@/lib/refresh-token';
@@ -12,6 +13,7 @@ export async function POST(request: NextRequest) {
   // 撤销当前设备的 Refresh Token
   if (authInfo && authInfo.username && authInfo.tokenId) {
     try {
+      invalidateDeviceAccessToken(authInfo.username, authInfo.tokenId);
       await revokeRefreshToken(authInfo.username, authInfo.tokenId);
       const storage = getStorage();
       await storage.deletePushSubscriptionsByTokenId?.(authInfo.username, authInfo.tokenId);
diff --git a/src/lib/access-token-invalidation.ts b/src/lib/access-token-invalidation.ts
new file mode 100644
index 0000000..d3fb739
--- /dev/null
+++ b/src/lib/access-token-invalidation.ts
@@ -0,0 +1,56 @@
+import type { AuthInfo } from './auth';
+
+const userInvalidBefore = new Map<string, number>();
+const deviceInvalidBefore = new Map<string, number>();
+
+function makeDeviceKey(username: string, tokenId: string): string {
+  return `${username}:${tokenId}`;
+}
+
+export function invalidateUserAccessTokens(username: string, invalidatedAt = Date.now()): void {
+  const current = userInvalidBefore.get(username) || 0;
+  if (invalidatedAt > current) {
+    userInvalidBefore.set(username, invalidatedAt);
+  }
+}
+
+export function invalidateDeviceAccessToken(
+  username: string,
+  tokenId: string,
+  invalidatedAt = Date.now()
+): void {
+  const key = makeDeviceKey(username, tokenId);
+  const current = deviceInvalidBefore.get(key) || 0;
+  if (invalidatedAt > current) {
+    deviceInvalidBefore.set(key, invalidatedAt);
+  }
+}
+
+export function isAccessTokenInvalidated(authInfo: AuthInfo | null): boolean {
+  if (!authInfo?.username || !authInfo.timestamp) {
+    return false;
+  }
+
+  const userInvalidatedAt = userInvalidBefore.get(authInfo.username);
+  if (userInvalidatedAt && authInfo.timestamp <= userInvalidatedAt) {
+    return true;
+  }
+
+  if (authInfo.tokenId) {
+    const deviceInvalidatedAt = deviceInvalidBefore.get(
+      makeDeviceKey(authInfo.username, authInfo.tokenId)
+    );
+    if (deviceInvalidatedAt && authInfo.timestamp <= deviceInvalidatedAt) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+export function getAccessTokenInvalidationState() {
+  return {
+    userInvalidBefore,
+    deviceInvalidBefore,
+  };
+}
diff --git a/src/lib/auth.ts b/src/lib/auth.ts
index aff1762..19cc3c0 100644
--- a/src/lib/auth.ts
+++ b/src/lib/auth.ts
@@ -1,5 +1,7 @@
 import { NextRequest } from 'next/server';
 
+import { isAccessTokenInvalidated } from './access-token-invalidation';
+
 export type AuthInfo = {
   password?: string;
   username?: string;
@@ -65,7 +67,7 @@ export function getAuthInfoFromCookie(request: NextRequest): AuthInfo | null {
     const headerValue = getAuthTokenFromHeader(authHeader);
     const headerAuthInfo = parseAuthInfo(headerValue);
     if (headerAuthInfo) {
-      return headerAuthInfo;
+      return isAccessTokenInvalidated(headerAuthInfo) ? null : headerAuthInfo;
     }
   }
 
@@ -75,7 +77,8 @@ export function getAuthInfoFromCookie(request: NextRequest): AuthInfo | null {
     return null;
   }
 
-  return parseAuthInfo(authCookie.value);
+  const authInfo = parseAuthInfo(authCookie.value);
+  return isAccessTokenInvalidated(authInfo) ? null : authInfo;
 }
 
 // 从cookie获取认证信息 (客户端使用)
diff --git a/src/middleware.ts b/src/middleware.ts
index 94e0144..8f3770d 100644
--- a/src/middleware.ts
+++ b/src/middleware.ts
@@ -2,6 +2,7 @@
 
 import { NextRequest, NextResponse } from 'next/server';
 
+import { isAccessTokenInvalidated } from '@/lib/access-token-invalidation';
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { TOKEN_CONFIG } from '@/lib/refresh-token';
 import { isTVModeEnabled } from '@/lib/tv-mode';
@@ -89,6 +90,11 @@ export async function middleware(request: NextRequest) {
     return handleAuthFailure(request, pathname);
   }
 
+  if (isAccessTokenInvalidated(authInfo)) {
+    console.log(`Access token invalidated for ${authInfo.username}`);
+    return handleAuthFailure(request, pathname);
+  }
+
   // 签名验证通过
   // 注意：Token 续期由前端负责，Middleware 不再自动刷新
   return NextResponse.next();