diff --git a/sgzb-modules/sgzb-material/src/main/java/com/bonus/sgzb/material/service/impl/InventoryAndWarehousingServiceImpl.java b/sgzb-modules/sgzb-material/src/main/java/com/bonus/sgzb/material/service/impl/InventoryAndWarehousingServiceImpl.java
index 88a0a445..2283b043 100644
--- a/sgzb-modules/sgzb-material/src/main/java/com/bonus/sgzb/material/service/impl/InventoryAndWarehousingServiceImpl.java
+++ b/sgzb-modules/sgzb-material/src/main/java/com/bonus/sgzb/material/service/impl/InventoryAndWarehousingServiceImpl.java
@@ -55,7 +55,7 @@ public class InventoryAndWarehousingServiceImpl implements InventoryAndWarehousi
             while (codeList.size() < dto.getNum()) {
                 String code = FieldGenerator.generateField();
                 int count = selectByCode(code);
-                if (count == 0) {
+                if (count == 0 && !codeList.contains(code)) {
                     codeList.add(code);
                 }
             }