diff --git a/src/main/java/com/gxwebsoft/common/system/controller/MainController.java b/src/main/java/com/gxwebsoft/common/system/controller/MainController.java
index b0ab0e3..e1f4311 100644
--- a/src/main/java/com/gxwebsoft/common/system/controller/MainController.java
+++ b/src/main/java/com/gxwebsoft/common/system/controller/MainController.java
@@ -616,13 +616,6 @@ public class MainController extends BaseController {
     if (param == null) {
       return fail("参数不能为空");
     }
-    // 默认配置（当租户未配置短信服务时使用）
-    String accessKeyId = "LTAI5t7jGTFTbpSLzzXY8HzP";
-    String accessKeySecret = "Z22EPJyUhQaIZfEEmZ4Hdbw6xZibCb";
-    String templateCode = "SMS_481670203";
-    String signName = "网宿信息";
-    String regionId = "cn-hangzhou";
-
     if (!CommonUtil.isValidPhoneNumber(param.getPhone())) {
       return fail("请输入有效的手机号码");
     }
@@ -655,13 +648,48 @@ public class MainController extends BaseController {
         return fail("租户ID格式不正确");
       }
     }
+    return sendSmsCaptchaInternal(param, tenantId);
+
+  }
+
+  @Operation(summary = "发送短信验证码(后台管理员, 跨租户)")
+  @PostMapping("/sendSmsCaptchaByAdmin")
+  public ApiResult<?> sendSmsCaptchaByAdmin(@RequestBody SmsCaptchaParam param) {
+    if (param == null) {
+      return fail("参数不能为空");
+    }
+    if (!CommonUtil.isValidPhoneNumber(param.getPhone())) {
+      return fail("请输入有效的手机号码");
+    }
+    // 跨租户校验：只要某个租户下该手机号是超级管理员或管理员即可发送验证码
+    final User admin = userService.getByPhoneAndAdmin(param.getPhone());
+    if (ObjectUtil.isEmpty(admin)) {
+      return fail("该手机号码未注册管理员账号！");
+    }
+    // 使用管理员所在租户的短信配置发送
+    return sendSmsCaptchaInternal(param, admin.getTenantId());
+  }
+
+  /**
+   * 短信发送核心逻辑
+   *
+   * @param param          参数
+   * @param configTenantId 用于读取租户短信配置的租户ID，为 null 时使用默认配置
+   */
+  private ApiResult<?> sendSmsCaptchaInternal(SmsCaptchaParam param, Integer configTenantId) {
+    // 默认配置（当租户未配置短信服务时使用）
+    String accessKeyId = "LTAI5t7jGTFTbpSLzzXY8HzP";
+    String accessKeySecret = "Z22EPJyUhQaIZfEEmZ4Hdbw6xZibCb";
+    String templateCode = "SMS_481670203";
+    String signName = "网宿信息";
+    String regionId = "cn-hangzhou";
 
     // 读取租户的短信配置（SettingController写入的key格式为：sms:{tenantId}）
-    if (tenantId != null) {
-      String settingJson = redisUtil.get("sms:" + tenantId);
+    if (configTenantId != null) {
+      String settingJson = redisUtil.get("sms:" + configTenantId);
       // 兼容历史key
       if (StrUtil.isBlank(settingJson)) {
-        settingJson = redisUtil.get("setting:sms:" + tenantId);
+        settingJson = redisUtil.get("setting:sms:" + configTenantId);
       }
       if (StrUtil.isNotBlank(settingJson)) {
         JSONObject jsonObject = JSONObject.parseObject(settingJson);
diff --git a/src/main/java/com/gxwebsoft/common/system/mapper/UserMapper.java b/src/main/java/com/gxwebsoft/common/system/mapper/UserMapper.java
index 0dce068..cdea5cd 100644
--- a/src/main/java/com/gxwebsoft/common/system/mapper/UserMapper.java
+++ b/src/main/java/com/gxwebsoft/common/system/mapper/UserMapper.java
@@ -117,4 +117,13 @@ public interface UserMapper extends BaseMapper<User> {
     @InterceptorIgnore(tenantLine = "true")
     User selectLastLoginDeveloperByPhone(@Param("phone") String phone);
 
+    /**
+     * 根据手机号查询管理员账号（跨租户：超级管理员或普通管理员均可，忽略租户隔离）
+     *
+     * @param phone 手机号
+     * @return User
+     */
+    @InterceptorIgnore(tenantLine = "true")
+    User selectAdminByPhoneCrossTenant(@Param("phone") String phone);
+
 }
diff --git a/src/main/java/com/gxwebsoft/common/system/mapper/xml/UserMapper.xml b/src/main/java/com/gxwebsoft/common/system/mapper/xml/UserMapper.xml
index b56f60e..cfe34c0 100644
--- a/src/main/java/com/gxwebsoft/common/system/mapper/xml/UserMapper.xml
+++ b/src/main/java/com/gxwebsoft/common/system/mapper/xml/UserMapper.xml
@@ -448,4 +448,16 @@
     LIMIT 1
   </select>
 
+  <!-- 根据手机号查询管理员账号（跨租户：超级管理员或普通管理员均可，忽略租户隔离） -->
+  <select id="selectAdminByPhoneCrossTenant" resultType="com.gxwebsoft.common.system.entity.User">
+    SELECT u.*
+    FROM sys_user u
+    WHERE u.deleted = 0
+      AND u.phone = #{phone}
+      AND (u.is_super_admin = 1 OR u.is_admin = 1)
+    ORDER BY u.update_time DESC,
+             u.user_id DESC
+    LIMIT 1
+  </select>
+
 </mapper>
diff --git a/src/main/java/com/gxwebsoft/common/system/service/UserService.java b/src/main/java/com/gxwebsoft/common/system/service/UserService.java
index 4e50822..fd8d8d7 100644
--- a/src/main/java/com/gxwebsoft/common/system/service/UserService.java
+++ b/src/main/java/com/gxwebsoft/common/system/service/UserService.java
@@ -144,6 +144,14 @@ public interface UserService extends IService<User>, UserDetailsService {
      */
     User getLastLoginDeveloperByPhone(String phone);
 
+    /**
+     * 根据手机号查询管理员账号（跨租户：超级管理员或普通管理员均可，忽略租户隔离）
+     *
+     * @param phone 手机号
+     * @return 用户信息
+     */
+    User getByPhoneAndAdmin(String phone);
+
     List<User> pageAll(UserParam param);
 
     User getByUserId(String userId);
diff --git a/src/main/java/com/gxwebsoft/common/system/service/impl/UserServiceImpl.java b/src/main/java/com/gxwebsoft/common/system/service/impl/UserServiceImpl.java
index a5332f6..37f1091 100644
--- a/src/main/java/com/gxwebsoft/common/system/service/impl/UserServiceImpl.java
+++ b/src/main/java/com/gxwebsoft/common/system/service/impl/UserServiceImpl.java
@@ -410,6 +410,11 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
       return baseMapper.selectLastLoginDeveloperByPhone(phone);
     }
 
+    @Override
+    public User getByPhoneAndAdmin(String phone) {
+      return baseMapper.selectAdminByPhoneCrossTenant(phone);
+    }
+
     @Override
     public List<User> pageAll(UserParam param) {
       return baseMapper.pageRelAll(param);