diff --git a/back/src/config/mysql.js b/back/src/config/mysql.js
new file mode 100644
index 0000000..2a043f4
--- /dev/null
+++ b/back/src/config/mysql.js
@@ -0,0 +1,53 @@
+const mysql = require('mysql2/promise');
+
+// 从环境变量读取配置，支持默认值 // TODO
+const MYSQL_HOST = '127.0.0.1';
+const MYSQL_PORT = 3306;
+const MYSQL_USER = 'root';
+const MYSQL_PASSWORD = '123456';
+const MYSQL_DATABASE = 'cus';
+
+// 创建连接池
+const pool = mysql.createPool({
+  host: MYSQL_HOST,
+  port: MYSQL_PORT,
+  user: MYSQL_USER,
+  password: MYSQL_PASSWORD,
+  database: MYSQL_DATABASE,
+  waitForConnections: true,
+  connectionLimit: 10, // TODO
+  queueLimit: 0
+});
+
+// 测试连接 // TODO
+pool.getConnection()
+  .then((connection) => {
+    console.log('MySQL 连接成功'); // TODO
+    connection.release();
+  })
+  .catch((err) => {
+    console.error('MySQL 连接失败:', err); // TODO
+  });
+
+// 执行查询
+async function query(sql, params) {
+  const [rows] = await pool.execute(sql, params);
+  return rows;
+}
+
+// 获取连接
+async function getConnection() {
+  return pool.getConnection();
+}
+
+// 关闭连接池
+async function close() {
+  return pool.end();
+}
+
+// 导出方法
+module.exports = {
+  query,
+  getConnection,
+  close
+};
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