diff --git a/web/ws_task.php b/web/ws_task.php
index 79f8fde..2ba01d0 100644
--- a/web/ws_task.php
+++ b/web/ws_task.php
@@ -11,14 +11,15 @@ require_once __DIR__ . '../../source/thinkphp/library/think/Config.php';
 require_once __DIR__ . '../../source/application/common.php';
 $config = require_once __DIR__ . '../../source/application/database.php';
 
-$dm = new Dm($config['connections']['dm']);
 // 注意：这里与上个例子不同，使用的是websocket协议
 $ws_worker = new Worker("websocket://0.0.0.0:2000");
 
 // 启动4个进程对外提供服务
 $ws_worker->count = 4;
 // 当收到客户端发来的数据后返回hello $data给客户端
-$ws_worker->onMessage = function(TcpConnection $connection, $data) use($dm) {
+$ws_worker->onMessage = function(TcpConnection $connection, $data) use($config) {
+    # 数据库链接不能在主进程，方法外是主进程
+    $dm = new Dm($config['connections']['dm']);
 
     $param = json_decode(html_entity_decode($data),true);
     $returnData = ['code' => 0, 'msg' => 'error：请求失败'];