diff --git a/back/src/middleware/jwt.js b/back/src/middleware/jwt.js
new file mode 100644
index 0000000..3018d50
--- /dev/null
+++ b/back/src/middleware/jwt.js
@@ -0,0 +1,70 @@
+const jwt = require('jsonwebtoken');
+const redisClient = require('../config/redis');
+const { standardResponse } = require('../utils/standardResponse');
+
+const JWT_SECRET = 'cus'; // TODO
+
+// 生成 JWT token
+function generateToken(payload, expiresIn) {
+  const signOptions = {
+    expiresIn: expiresIn
+  };
+  return jwt.sign(payload, JWT_SECRET, signOptions);
+}
+
+// 验证 JWT token
+function verifyToken(token) {
+  return jwt.verify(token, JWT_SECRET);
+}
+
+// 将 token 添加到 Redis 黑名单
+async function addTokenToBlacklist(token, expiresIn = 3600) {
+  await redisClient.setEx(`blacklist:${token}`, expiresIn, '1');
+}
+
+// 检查 token 是否在 Redis 黑名单中
+async function isTokenBlacklisted(token) {
+  return await redisClient.exists(`blacklist:${token}`) === 1;
+}
+
+// JWT 认证中间件
+async function jwtAuth(req, res, next) {
+  const authHeader = req.headers.authorization;
+  
+  if (!authHeader) {
+    return res.status(401).json(standardResponse(401, '未提供认证信息'));
+  }
+  
+  const parts = authHeader.split(' ');
+  if (parts.length !== 2 || parts[0] !== 'Bearer') {
+    return res.status(401).json(standardResponse(401, '认证格式错误，应为：Bearer <token>'));
+  }
+  
+  const token = parts[1];
+  
+  try {
+    if (await isTokenBlacklisted(token)) {
+      return res.status(401).json(standardResponse(401, 'token 已失效'));
+    }
+    
+    const decoded = verifyToken(token);
+    req.user = decoded;
+    req.token = token;
+    next();
+  } catch (error) {
+    if (error.name === 'TokenExpiredError') {
+      return res.status(401).json(standardResponse(401, 'token 已过期'));
+    }
+    if (error.name === 'JsonWebTokenError') {
+      return res.status(401).json(standardResponse(401, '无效的 token'));
+    }
+    return res.status(500).json(standardResponse(401, '认证失败'));
+  }
+}
+
+module.exports = {
+  generateToken,
+  verifyToken,
+  addTokenToBlacklist,
+  jwtAuth
+};
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