diff --git a/kernel-s-system/system-api/src/main/java/cn/stylefeng/roses/kernel/sys/api/constants/SysConstants.java b/kernel-s-system/system-api/src/main/java/cn/stylefeng/roses/kernel/sys/api/constants/SysConstants.java
index 4d8a232cb..18600a349 100644
--- a/kernel-s-system/system-api/src/main/java/cn/stylefeng/roses/kernel/sys/api/constants/SysConstants.java
+++ b/kernel-s-system/system-api/src/main/java/cn/stylefeng/roses/kernel/sys/api/constants/SysConstants.java
@@ -72,4 +72,9 @@ public interface SysConstants {
      */
     Long DEFAULT_SYS_CACHE_TIMEOUT_SECONDS = 3600L;
 
+    /**
+     * 默认租户ID
+     */
+    Long DEFAULT_ROOT_TENANT_ID = 1L;
+
 }
diff --git a/kernel-s-system/system-api/src/main/java/cn/stylefeng/roses/kernel/sys/api/expander/SysConfigExpander.java b/kernel-s-system/system-api/src/main/java/cn/stylefeng/roses/kernel/sys/api/expander/SysConfigExpander.java
index 6668043d1..ca5f10601 100644
--- a/kernel-s-system/system-api/src/main/java/cn/stylefeng/roses/kernel/sys/api/expander/SysConfigExpander.java
+++ b/kernel-s-system/system-api/src/main/java/cn/stylefeng/roses/kernel/sys/api/expander/SysConfigExpander.java
@@ -46,4 +46,14 @@ public class SysConfigExpander {
         return ConfigContext.me().getSysConfigValueWithDefault("SYS_DEFAULT_PASSWORD", String.class, SysConstants.DEFAULT_LOGIN_PASSWORD);
     }
 
+    /**
+     * 获取默认租户的id
+     *
+     * @author fengshuonan
+     * @since 2023/8/31 0:55
+     */
+    public static Long getDefaultRootTenantId() {
+        return ConfigContext.me().getSysConfigValueWithDefault("DEFAULT_ROOT_TENANT_ID", Long.class, SysConstants.DEFAULT_ROOT_TENANT_ID);
+    }
+
 }
diff --git a/kernel-s-system/system-spring-boot-starter/src/main/java/cn/stylefeng/roses/kernel/sys/starter/init/InitAdminService.java b/kernel-s-system/system-spring-boot-starter/src/main/java/cn/stylefeng/roses/kernel/sys/starter/init/InitAdminService.java
index 34668af2d..01931d5ac 100644
--- a/kernel-s-system/system-spring-boot-starter/src/main/java/cn/stylefeng/roses/kernel/sys/starter/init/InitAdminService.java
+++ b/kernel-s-system/system-spring-boot-starter/src/main/java/cn/stylefeng/roses/kernel/sys/starter/init/InitAdminService.java
@@ -25,6 +25,7 @@
 package cn.stylefeng.roses.kernel.sys.starter.init;
 
 import cn.stylefeng.roses.kernel.sys.api.constants.SysConstants;
+import cn.stylefeng.roses.kernel.sys.api.expander.SysConfigExpander;
 import cn.stylefeng.roses.kernel.sys.modular.menu.entity.SysMenu;
 import cn.stylefeng.roses.kernel.sys.modular.menu.entity.SysMenuOptions;
 import cn.stylefeng.roses.kernel.sys.modular.menu.service.SysMenuOptionsService;
@@ -73,9 +74,11 @@ public class InitAdminService {
     @Transactional(rollbackFor = Exception.class)
     public void initSuperAdmin() {
 
-        // 找到后台管理员角色id
+        // 找到默认系统租户下，后台管理员角色id
         LambdaQueryWrapper<SysRole> queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(SysRole::getRoleCode, SysConstants.BACKEND_ADMIN_ROLE_CODE);
+        // 默认根租户
+        queryWrapper.eq(SysRole::getTenantId, SysConfigExpander.getDefaultRootTenantId());
         queryWrapper.select(SysRole::getRoleId);
         SysRole superAdminRole = sysRoleService.getOne(queryWrapper);