diff --git a/src/main/java/com/muyu/system/service/impl/BuyServiceImpl.java b/src/main/java/com/muyu/system/service/impl/BuyServiceImpl.java
index 9d47e1e..eca05bd 100644
--- a/src/main/java/com/muyu/system/service/impl/BuyServiceImpl.java
+++ b/src/main/java/com/muyu/system/service/impl/BuyServiceImpl.java
@@ -36,9 +36,12 @@ public class BuyServiceImpl extends ServiceImpl<BuyMapper, Connector> implements
 //        //获取当前的用户信息
 //        LoginUser loginUser = SecurityUtils.getLoginUser();
         connectorUser.setUserId(userId);
+        SysUser user = buyMapper.selectUser(userId);
+        if (user.getUserBalance()<connectorUser.getConnectorFrequency()*connectorUser.getConnectorPrice()){
+            return Result.error("余额不足");
+        }
         Integer i = buyMapper.doBuyInterface(connectorUser);
         if (i>0){
-            SysUser user = buyMapper.selectUser(userId);
             user.setUserBalance(user.getUserBalance()-connectorUser.getConnectorFrequency()*connectorUser.getConnectorPrice());
             buyMapper.buyPrice(user);
             return Result.success(i,"购买成功");
@@ -47,10 +50,9 @@ public class BuyServiceImpl extends ServiceImpl<BuyMapper, Connector> implements
         if (connectorUser1==null){
             Integer i1 = buyMapper.addConnectorUser(connectorUser);
             if (i1>0){
-                buyMapper.doBuyInterface(connectorUser);
-                SysUser user = buyMapper.selectUser(userId);
                 user.setUserBalance(user.getUserBalance()-connectorUser.getConnectorFrequency()*connectorUser.getConnectorPrice());
                 buyMapper.buyPrice(user);
+                buyMapper.doBuyInterface(connectorUser);
                 return Result.success(i,"购买成功");
             }
         }