diff --git a/src/main/java/com/campus/water/service/AdminService.java b/src/main/java/com/campus/water/service/AdminService.java
index 6f319bb..248cfce 100644
--- a/src/main/java/com/campus/water/service/AdminService.java
+++ b/src/main/java/com/campus/water/service/AdminService.java
@@ -49,6 +49,10 @@ public class AdminService {
      * 新增/修改管理员（支持指定角色）
      */
     public Admin saveAdmin(Admin admin) {
+        // 新增：校验adminId非空
+        if (admin.getAdminId() == null || admin.getAdminId().isEmpty()) {
+            throw new IllegalArgumentException("管理员ID（adminId）不能为空");
+        }
         admin.setUpdatedTime(LocalDateTime.now());
         if (admin.getCreatedTime() == null) {
             admin.setCreatedTime(LocalDateTime.now());