diff --git a/ARW.Model/Dto/Business/Marketing/CouponManage/Coupons/CouponDto.cs b/ARW.Model/Dto/Business/Marketing/CouponManage/Coupons/CouponDto.cs
index 6511b48..67e6e08 100644
--- a/ARW.Model/Dto/Business/Marketing/CouponManage/Coupons/CouponDto.cs
+++ b/ARW.Model/Dto/Business/Marketing/CouponManage/Coupons/CouponDto.cs
@@ -36,9 +36,9 @@ namespace ARW.Model.Dto.Business.Marketing.CouponManage.Coupons
 
         public int? CouponEffectiveDays { get; set; }
 
-        public DateTime? CouponFixedStartTime { get; set; }
+        public DateTime CouponFixedStartTime { get; set; }
 
-        public DateTime? CouponFixedEndTime { get; set; }
+        public DateTime CouponFixedEndTime { get; set; }
 
         public int? CouponApplicableScope { get; set; }
 
diff --git a/ARW.Model/Models/Business/Marketing/CouponManage/Coupons/Coupon.cs b/ARW.Model/Models/Business/Marketing/CouponManage/Coupons/Coupon.cs
index 3e96549..c9f4d52 100644
--- a/ARW.Model/Models/Business/Marketing/CouponManage/Coupons/Coupon.cs
+++ b/ARW.Model/Models/Business/Marketing/CouponManage/Coupons/Coupon.cs
@@ -104,7 +104,7 @@ namespace ARW.Model.Models.Business.Marketing.CouponManage.Coupons
         /// </summary>
         [EpplusTableColumn(Header = "固定时间-开始时间", NumberFormat = "yyyy-MM-dd HH:mm:ss")]
         [SugarColumn(ColumnName = "coupon_fixed_start_time")]
-        public DateTime? CouponFixedStartTime { get; set; }
+        public DateTime CouponFixedStartTime { get; set; }
 
 
         /// <summary>
@@ -113,7 +113,7 @@ namespace ARW.Model.Models.Business.Marketing.CouponManage.Coupons
         /// </summary>
         [EpplusTableColumn(Header = "固定时间-结束时间", NumberFormat = "yyyy-MM-dd HH:mm:ss")]
         [SugarColumn(ColumnName = "coupon_fixed_end_time")]
-        public DateTime? CouponFixedEndTime { get; set; }
+        public DateTime CouponFixedEndTime { get; set; }
 
 
         /// <summary>
diff --git a/ARW.Model/Vo/Business/Marketing/CouponManage/Coupons/CouponVo.cs b/ARW.Model/Vo/Business/Marketing/CouponManage/Coupons/CouponVo.cs
index 9e36c42..9ac6b6c 100644
--- a/ARW.Model/Vo/Business/Marketing/CouponManage/Coupons/CouponVo.cs
+++ b/ARW.Model/Vo/Business/Marketing/CouponManage/Coupons/CouponVo.cs
@@ -83,14 +83,14 @@ namespace ARW.Model.Vo.Business.Marketing.CouponManage.Coupons
         /// 描述 :固定时间-开始时间 
         /// </summary>
 		[EpplusIgnore]
-        public DateTime? CouponFixedStartTime { get; set; }
+        public DateTime CouponFixedStartTime { get; set; }
 
 
         /// <summary>
         /// 描述 :固定时间-结束时间 
         /// </summary>
 		[EpplusIgnore]
-        public DateTime? CouponFixedEndTime { get; set; }
+        public DateTime CouponFixedEndTime { get; set; }
 
 
         /// <summary>