diff --git a/business/partner/purchase/weimob/wsc/store_sku.go b/business/partner/purchase/weimob/wsc/store_sku.go
index c8709deb1..b827b4eeb 100644
--- a/business/partner/purchase/weimob/wsc/store_sku.go
+++ b/business/partner/purchase/weimob/wsc/store_sku.go
@@ -223,11 +223,19 @@ func (p *PurchaseHandler) SyncStoreSkus(ctx *jxcontext.Context, parentTask tasks
 						updateFields = append(updateFields, model.FieldWscID, model.FieldWscID2)
 					}
 				} else {
-					// http://open.weimob.com/docapi/article?tag=Af
-					// sku id，如果为空，则新增sku； 如果更新之前的skuId与入参skuId对应，则更新sku； 如果更新之前的skuId没有和入参的skuId对应，删除更新之前的sku
-					skuList[0][weimobapi.KeySkuID] = utils.Str2Int64WithDefault(skuItem.VendorSkuID, 0)
 					goodsID := utils.Str2Int64WithDefault(skuItem.VendorNameID, 0)
-					_, _, err = api.WeimobAPI.UpdateGoods(goodsID, title, false, []string{skuItem.Img}, skuItem.Comment, isPutAway, 0, categoryId, classifyIdList, b2cGoods, skuList, nil)
+
+					goodsInfo, err2 := api.WeimobAPI.QueryGoodsDetail(goodsID)
+					if err = err2; err == nil {
+						// http://open.weimob.com/docapi/article?tag=Af
+						// sku id，如果为空，则新增sku； 如果更新之前的skuId与入参skuId对应，则更新sku； 如果更新之前的skuId没有和入参的skuId对应，删除更新之前的sku
+						skuList[0][weimobapi.KeySkuID] = utils.Str2Int64WithDefault(skuItem.VendorSkuID, 0)
+						remoteSkuList := goodsInfo[weimobapi.KeySkuList].([]interface{})
+						if len(remoteSkuList) > 0 {
+							skuList[0][weimobapi.KeyEditStockNum] = model.MaxStoreSkuStockQty - int(utils.MustInterface2Int64(remoteSkuList[0].(map[string]interface{})[weimobapi.KeyAvailableStockNum]))
+						}
+						_, _, err = api.WeimobAPI.UpdateGoods(goodsID, title, false, []string{skuItem.Img}, skuItem.Comment, isPutAway, 0, categoryId, classifyIdList, b2cGoods, skuList, nil)
+					}
 				}
 			}
 		}