diff --git a/app/common/service/pay/WeChatPayService.php b/app/common/service/pay/WeChatPayService.php
index 9896e86f9..4385e513e 100755
--- a/app/common/service/pay/WeChatPayService.php
+++ b/app/common/service/pay/WeChatPayService.php
@@ -408,6 +408,7 @@ class WeChatPayService extends BasePayService
 
         $config['paySign'] = $sign;
         $config['timestamp'] = $config['timeStamp'];
+        $config['partnerid'] = $this->config['mch_id'];
         unset($config['timeStamp']);
         return $config;
     }