diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/PayService.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/PayService.java
index 369c3c3..57dab7d 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/PayService.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/PayService.java
@@ -504,6 +504,7 @@ public class PayService {
                 orderInfo.setCouponInfoList(JSONObject.toJSONString(couponInfoDTO));
                 orderInfo.setUserCouponId(null);
                 orderInfo.setUseCouponInfo(null);
+                orderInfo.setFullCouponDiscountAmount(BigDecimal.ZERO);
 
                 // 修改购物车券信息
                 cashierCartMapper.update(null, new LambdaUpdateWrapper<TbCashierCart>()