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 41c8be0..a5c4f35 100644
--- a/src/main/java/com/gxwebsoft/common/system/mapper/UserMapper.java
+++ b/src/main/java/com/gxwebsoft/common/system/mapper/UserMapper.java
@@ -62,6 +62,14 @@ public interface UserMapper extends BaseMapper<User> {
     @InterceptorIgnore(tenantLine = "true")
     User selectByIdIgnoreTenant(@Param("userId") Integer userId);
 
+    /**
+     * 根据手机号查询用户（忽略租户隔离，跨库查 gxwebsoft_core.sys_user）
+     * @param phone 手机号
+     * @return User
+     */
+    @InterceptorIgnore(tenantLine = "true")
+    User selectByPhone(@Param("phone") String phone);
+
     @InterceptorIgnore(tenantLine = "true")
     List<User> pageAdminByPhone(@Param("param") UserParam param);
 
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 df27bef..4a2a32e 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
@@ -182,20 +182,13 @@
         </where>
     </select>
 
-    <!-- 根据手机号码查询 -->
+    <!-- 根据手机号码查询（跨租户，忽略租户隔离） -->
     <select id="selectByPhone" resultType="com.gxwebsoft.common.system.entity.User">
       SELECT a.*
       FROM gxwebsoft_core.sys_user a
-      <where>
-        AND a.deleted = 0
+      WHERE a.deleted = 0
         AND a.phone = #{phone}
-        <if test="tenantId != null">
-          AND a.tenant_id = #{tenantId}
-        </if>
-        <if test="tenantId == null">
-          AND a.tenant_id = 1
-        </if>
-      </where>
+      LIMIT 1
     </select>
 
   <!-- 获取所有的邮政协会/管局工作人员 -->
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 b321832..6ba5309 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
@@ -180,7 +180,8 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
 
   @Override
   public User getByPhone(String phone) {
-    return query().eq("phone", phone).one();
+    // 使用自定义 SQL（@InterceptorIgnore），避免 TenantLineInterceptor 把表定位到当前库的 sys_user
+    return baseMapper.selectByPhone(phone);
   }
 
   @Override