diff --git a/BBWY.Server.Business/Order/OrderBusiness.cs b/BBWY.Server.Business/Order/OrderBusiness.cs
index f6e3905e..b5d2fe24 100644
--- a/BBWY.Server.Business/Order/OrderBusiness.cs
+++ b/BBWY.Server.Business/Order/OrderBusiness.cs
@@ -661,6 +661,9 @@ namespace BBWY.Server.Business
             if (dbOrder == null)
                 throw new BusinessException($"订单号{relationPurchaseOrderRequest.OrderDropShipping.OrderId}不存在");
 
+            if (relationPurchaseOrderRequest.PlatformCommissionRatio == 0M)
+                relationPurchaseOrderRequest.PlatformCommissionRatio = 0.05M;
+
             IInsert<OrderDropShipping> insertOrderDropShipping = null;
             IUpdate<OrderDropShipping> updateOrderDropShipping = null;
             IInsert<OrderCost> insertOrderCost = null;
@@ -714,6 +717,8 @@ namespace BBWY.Server.Business
             var orderCost = fsql.Select<OrderCost>(relationPurchaseOrderRequest.OrderDropShipping.OrderId).ToOne();
             if (orderCost != null)
             {
+                orderCost.PlatformCommissionRatio = relationPurchaseOrderRequest.PlatformCommissionRatio;
+                orderCost.PlatformCommissionAmount = dbOrder.OrderSellerPrice * relationPurchaseOrderRequest.PlatformCommissionRatio;
                 orderCost.DeliveryExpressFreight = relationPurchaseOrderRequest.OrderDropShipping.DeliveryFreight;
                 orderCost.PurchaseAmount = relationPurchaseOrderRequest.OrderDropShipping.PurchaseAmount;
                 orderCost.Profit = dbOrder.OrderSellerPrice +
@@ -733,9 +738,6 @@ namespace BBWY.Server.Business
             {
                 var preferentialAmount = fsql.Select<OrderCoupon>().Where(oc => oc.OrderId == relationPurchaseOrderRequest.OrderDropShipping.OrderId)
                                                                    .ToAggregate(g => g.Sum(g.Key.CouponPrice));
-
-                if (relationPurchaseOrderRequest.PlatformCommissionRatio == 0M)
-                    relationPurchaseOrderRequest.PlatformCommissionRatio = 0.05M;
                 orderCost = new OrderCost()
                 {
                     OrderId = relationPurchaseOrderRequest.OrderDropShipping.OrderId,