diff --git a/1024shop-manager/1024shop-manager/src/main/java/net/xdclass/shopmanager/controller/SubController.java b/1024shop-manager/1024shop-manager/src/main/java/net/xdclass/shopmanager/controller/SubController.java
index 4d0d283..1e56723 100644
--- a/1024shop-manager/1024shop-manager/src/main/java/net/xdclass/shopmanager/controller/SubController.java
+++ b/1024shop-manager/1024shop-manager/src/main/java/net/xdclass/shopmanager/controller/SubController.java
@@ -758,7 +758,7 @@ public class SubController {
             //钢种标准对比
 
             GCalGrp GCG = new GCalGrp();
-            GCG.setLtInfoGPreOrder(new ArrayList<>());
+            GCG.setLtInfoGPreOrder(new CopyOnWriteArrayList<>());
             e.getLtInfoGPreOrder().parallelStream().forEach(f -> {
 
                 try {