diff --git a/modules/items/modelitems.go b/modules/items/modelitems.go
index c522c4d02..7badcf0c1 100644
--- a/modules/items/modelitems.go
+++ b/modules/items/modelitems.go
@@ -171,7 +171,7 @@ func (this *ModelItemsComp) AddItemsToUserPack(uId string, items map[int32]int32
 		this.module.Errorf("err:%v", err)
 		return
 	}
-	change = make([]*pb.DB_UserItemData, len(itmes))
+	change = make([]*pb.DB_UserItemData, 0)
 	for k, v := range items {
 		add, update, del, leftnum = this.addItemToUserPack(uId, itmes, k, v)
 		if leftnum < 0 {