diff --git a/business/partner/purchase/mtwm/order.go b/business/partner/purchase/mtwm/order.go
index 6e3836871..ce8dd1663 100644
--- a/business/partner/purchase/mtwm/order.go
+++ b/business/partner/purchase/mtwm/order.go
@@ -633,7 +633,6 @@ func (p *PurchaseHandler) GetOrderCourierNumber(ctx *jxcontext.Context, storeID
 }
 
 func (p *PurchaseHandler) onNumberDowngrade(msg *mtwmapi.CallbackMsg) (response *mtwmapi.CallbackResponse) {
-	var userNumberList, courierNumberList []*partner.OrderPhoneNumberInfo
 	userNumberMap := make(map[string]*partner.OrderPhoneNumberInfo)
 	courierNumberMap := make(map[string]*partner.OrderPhoneNumberInfo)
 	orderMap := make(map[string]int)
@@ -643,14 +642,16 @@ func (p *PurchaseHandler) onNumberDowngrade(msg *mtwmapi.CallbackMsg) (response
 			step := batchItemList[0].(int)
 			switch step {
 			case 0:
-				if userNumberList, err = p.GetOrderConsigneeNumber(ctx, 0, ""); err == nil {
+				userNumberList, err2 := p.GetOrderConsigneeNumber(ctx, 0, "")
+				if err = err2; err == nil {
 					for _, v := range userNumberList {
 						userNumberMap[v.VendorOrderID] = v
 						orderMap[v.VendorOrderID] = 1
 					}
 				}
 			case 1:
-				if courierNumberList, err = p.GetOrderCourierNumber(ctx, 0, ""); err == nil {
+				courierNumberList, err2 := p.GetOrderCourierNumber(ctx, 0, "")
+				if err = err2; err == nil {
 					for _, v := range courierNumberList {
 						courierNumberMap[v.VendorOrderID] = v
 						orderMap[v.VendorOrderID] = 1
@@ -685,6 +686,9 @@ func (p *PurchaseHandler) onNumberDowngrade(msg *mtwmapi.CallbackMsg) (response
 					tasksch.HandleTask(updateTask, task, true).Run()
 					_, err = updateTask.GetResult(0)
 				}
+				userNumberMap = nil
+				courierNumberMap = nil
+				orderMap = nil
 			}
 			return retVal, err
 		}, []int{0, 1, 2})