diff --git a/app/common/model/Merchant.php b/app/common/model/Merchant.php
index 90280765..0526a279 100644
--- a/app/common/model/Merchant.php
+++ b/app/common/model/Merchant.php
@@ -26,7 +26,7 @@ class Merchant extends BaseModel
     protected $name = 'merchant';
 
     // 定义主键
-    protected $pk = 'id';
+    protected $pk = 'merchant_id';
 
     /**
      * 关联logo图片