diff --git a/app/controller/api/Auth.php b/app/controller/api/Auth.php
index 33538206..76d55867 100644
--- a/app/controller/api/Auth.php
+++ b/app/controller/api/Auth.php
@@ -390,11 +390,11 @@ class Auth extends BaseController
         }
         if ($merchant['margin'] == 0) {
             $margin = Db::name('MerchantType')->where('mer_type_id', $merchant['type_id'])->value('margin');
-            $margin = bcsub($margin, $merchant['paid_margin'], 2);
-        } else {
-            $margin = $merchant['margin'];
+            $margin = bcsub($margin,$merchant['paid_margin'],2);
+        }else{
+            $margin=$merchant['margin'];
         }
-        if ($margin == 0) {
+        if($margin==0){
             return app('json')->fail('当前金额为0,不能进行充值');
         }
         $orderSn = "bzj" . date('YmdHis') . uniqid();