diff --git a/src/main/java/digital/laboratory/platform/entrustment/service/impl/EntrustAlterApplyServiceImpl.java b/src/main/java/digital/laboratory/platform/entrustment/service/impl/EntrustAlterApplyServiceImpl.java
index 2d2624d..1f3384d 100644
--- a/src/main/java/digital/laboratory/platform/entrustment/service/impl/EntrustAlterApplyServiceImpl.java
+++ b/src/main/java/digital/laboratory/platform/entrustment/service/impl/EntrustAlterApplyServiceImpl.java
@@ -351,6 +351,9 @@ public class EntrustAlterApplyServiceImpl extends ServiceImpl<EntrustAlterApplyM
             }
             updateRecordBuilder.append("<br>鉴定要求更新记录：").append("<br>原鉴定要求 [").append(entrustment.getEntrustRequirement()).append("] 修改为  [").append(entrustRequirement).append("]。");
             entrustment.setEntrustRequirement(entrustRequirement);
+        } else if (entrustment.getEntrustRequirement().equals(entrustRequirement)) {
+            // 如果鉴定要求没有变化，不做任何操作
+            return;
         } else {
             List<EntrustmentIdentificationMaterial> renewList = entrustmentIdentificationMaterialService.list(Wrappers.<EntrustmentIdentificationMaterial>lambdaQuery()
                     .eq(EntrustmentIdentificationMaterial::getEntrustmentId, entrustment.getId())