diff --git a/api/service/OrderMember.go b/api/service/OrderMember.go
index aeb3802..181f8d4 100644
--- a/api/service/OrderMember.go
+++ b/api/service/OrderMember.go
@@ -14,6 +14,7 @@ import (
 	"hepa-calc-api/extend/weChat"
 	"hepa-calc-api/global"
 	"hepa-calc-api/utils"
+	"math"
 	"time"
 )
 
@@ -102,7 +103,11 @@ func (r *OrderMemberService) AddOrderMember(tx *gorm.DB, UserId, SystemMemberId
 
 		userCouponService := &UserCouponService{}
 		isCanUse, err := userCouponService.CheckUserCoupon(userCoupon, SystemMemberId, 2, amountTotal)
-		if err != nil || isCanUse == false {
+		if err != nil {
+			return nil, err
+		}
+
+		if isCanUse == false {
 			return nil, errors.New("价格异常")
 		}
 
@@ -112,6 +117,7 @@ func (r *OrderMemberService) AddOrderMember(tx *gorm.DB, UserId, SystemMemberId
 
 	// 实际付款金额
 	paymentAmountTotal = amountTotal - couponAmountTotal // 实际付款金额
+	paymentAmountTotal = math.Round(paymentAmountTotal*100) / 100
 	if paymentAmountTotal < 0 {
 		paymentAmountTotal = 0
 	}
diff --git a/api/service/OrderSingle.go b/api/service/OrderSingle.go
index 22494cf..694ec7d 100644
--- a/api/service/OrderSingle.go
+++ b/api/service/OrderSingle.go
@@ -14,6 +14,7 @@ import (
 	"hepa-calc-api/extend/weChat"
 	"hepa-calc-api/global"
 	"hepa-calc-api/utils"
+	"math"
 	"time"
 )
 
@@ -84,6 +85,13 @@ func (r *OrderSingleService) AddOrderSingle(tx *gorm.DB, UserId, QuestionId int6
 	// 检测用户优惠卷
 	var userCoupon *model.UserCoupon
 	if UserCouponId != nil {
+		// 检测用户是否购买过单项产品
+		userService := &UserService{}
+		isBuy := userService.CheckUserBuySingle(UserId)
+		if isBuy == false {
+			return nil, errors.New("不可使用优惠卷")
+		}
+
 		// 获取优惠卷数据
 		UserCouponDao := dao.UserCouponDao{}
 		userCoupon, err = UserCouponDao.GetUserCouponPreloadById(*UserCouponId)
@@ -94,7 +102,11 @@ func (r *OrderSingleService) AddOrderSingle(tx *gorm.DB, UserId, QuestionId int6
 		// 检测用户优惠卷
 		userCouponService := &UserCouponService{}
 		isCanUse, err := userCouponService.CheckUserCoupon(userCoupon, QuestionId, 1, amountTotal)
-		if err != nil || isCanUse == false {
+		if err != nil {
+			return nil, err
+		}
+
+		if isCanUse == false {
 			return nil, errors.New("价格异常")
 		}
 
@@ -131,9 +143,11 @@ func (r *OrderSingleService) AddOrderSingle(tx *gorm.DB, UserId, QuestionId int6
 
 		// 实际付款金额
 		paymentAmountTotal = amountTotal - couponAmountTotal
+		paymentAmountTotal = math.Round(paymentAmountTotal*100) / 100
 		if paymentAmountTotal < 0 {
 			paymentAmountTotal = 0
 		}
+
 		if *orderPrice != paymentAmountTotal {
 			return nil, errors.New("价格异常")
 		}