diff --git a/app/Service/CouponRebateService.php b/app/Service/CouponRebateService.php
index 49c085c..7a2f310 100644
--- a/app/Service/CouponRebateService.php
+++ b/app/Service/CouponRebateService.php
@@ -290,6 +290,11 @@ class CouponRebateService implements CouponRebateServiceInterface
             //开启事务
             Db::beginTransaction();
             try {
+                //读写锁
+                Db::table('ims_system_user')
+                    ->lockForUpdate()
+                    ->where('id', $active['repay'])
+                    ->get();
                 //返券
                 if($exists_coupon_rebate){
                     //如果已有该优惠券 则领取数量 和 可用数量 自增1