diff --git a/api/service/OrderMember.go b/api/service/OrderMember.go
index 7526b3a..ad4181a 100644
--- a/api/service/OrderMember.go
+++ b/api/service/OrderMember.go
@@ -61,7 +61,7 @@ func (r *OrderMemberService) AddOrderMember(tx *gorm.DB, UserId, SystemMemberId
 		memberExpireDate := time.Time(*user.MemberExpireDate)
 		diff := memberExpireDate.Sub(now)
 		// 将差值转换为天数
-		diffDays := int(diff.Hours() / 24)
+		diffDays := int(diff.Hours()/24) + 1
 		totalDays := diffDays + int(systemMember.MemberDays)
 		if totalDays > 3 {
 			return nil, errors.New("超出会员最大购买天数")