diff --git a/postdischarge-manage/src/main/java/com/xinelu/manage/service/department/impl/DepartmentServiceImpl.java b/postdischarge-manage/src/main/java/com/xinelu/manage/service/department/impl/DepartmentServiceImpl.java
index f3de2b33..ee46c83e 100644
--- a/postdischarge-manage/src/main/java/com/xinelu/manage/service/department/impl/DepartmentServiceImpl.java
+++ b/postdischarge-manage/src/main/java/com/xinelu/manage/service/department/impl/DepartmentServiceImpl.java
@@ -124,6 +124,9 @@ public class DepartmentServiceImpl implements IDepartmentService {
      */
     @Override
     public int updateDepartment(Department department) {
+        if (Objects.nonNull(department) && Objects.nonNull(department.getId()) && Objects.nonNull(department.getParentDepartmentId()) && department.getId().equals(department.getParentDepartmentId())) {
+            department.setParentDepartmentId(null);
+        }
         department.setUpdateBy(SecurityUtils.getUsername());
         department.setUpdateTime(LocalDateTime.now());
         return departmentMapper.updateDepartmentById(department);