diff --git a/sig/sig-basicsoftwareservice/sig-basicsoftwareservice.md b/sig/sig-basicsoftwareservice/sig-basicsoftwareservice.md
index cbdd26302d9870f1a7be09385071081df36e14a0..412dfbb449073d4cd458f81fc0215bbb912fe1cf 100755
--- a/sig/sig-basicsoftwareservice/sig-basicsoftwareservice.md
+++ b/sig/sig-basicsoftwareservice/sig-basicsoftwareservice.md
@@ -54,6 +54,7 @@ Basic Software Services includes the following sub-systems:
| Update Pakaging Tools | [update_packaging_tools](https://gitee.com/openharmony/update_packaging_tools) | Update Packaging Tools provide tools to build full OTA packages and differential packages. |
| Update Package Installer | [update_updater](https://gitee.com/openharmony/update_updater) | Update Package Installer can verify OTA package, and install the package to the OpenHarmony device. |
| Updating Service | [update_updateservice](https://gitee.com/openharmony/update_updateservice) | Updating Service can query and download OTA packages. |
+| Update System Installer | [update_sys_installer](https://gitee.com/openharmony-sig/update_sys_installer) | Update System Installer can verify OTA package, and install the package to the OpenHarmony device for AB system. |
| Account Manager | [account_os_account](https://gitee.com/openharmony/account_os_account) | Account Manager can create/delete, login/logout and query system accounts. It can also manage application accounts and distributed accounts. |
| Barrier Free Service | [accessibility](https://gitee.com/openharmony/accessibility) | Barrier Free Service can provide information exchange framework between application and accessibilities applications. |
| Enterprise Device Management | [customization_enterprise_device_management](https://gitee.com/openharmony-sig/customization_enterprise_device_management) | Enterprise Device Management provide API for enterprise applications to manager OpenHarmony devices in scale. |
diff --git a/sig/sig-basicsoftwareservice/sig-basicsoftwareservice_cn.md b/sig/sig-basicsoftwareservice/sig-basicsoftwareservice_cn.md
index c9c1ccd813c0e220f2a0d7c06f285eff66f27d92..4f2e8b69253fa33a6d5b0a3374e8dbbc9ac0f314 100755
--- a/sig/sig-basicsoftwareservice/sig-basicsoftwareservice_cn.md
+++ b/sig/sig-basicsoftwareservice/sig-basicsoftwareservice_cn.md
@@ -54,6 +54,7 @@ BasicSoftwareService SIG技术栈范围全景图如下图所示:
|升级工具|[update_packaging_tools](https://gitee.com/openharmony/update_packaging_tools)|升级包制作工具是用于制作升级包的工具,功能主要包括:全量升级包制作、差分升级包制作以及变分区升级包制作。|
|升级包安装|[update_updater](https://gitee.com/openharmony/update_updater)|升级包安装组件,其功能主要包括读取misc分区信息获取升级包状态,对升级包进行校验,确保升级包合法有效;然后从升级包中解析出升级的可执行程序,创建子进程并启动升级程序。具体升级的动作由升级脚本控制。|
|升级服务|[update_updateservice](https://gitee.com/openharmony/update_updateservice)|升级服务组件是一个SA(System Ability),由OHOS 的init 进程负责启动。主要功能包括:
1、查找可用的升级包;
2、下载升级包;
3、设置/获取升级策略;
4、触发升级|
+|升级包系统安装|[update_sys_installer](https://gitee.com/openharmony-sig/update_sys_installer)|升级包系统安装组件,其功能主要包括读取AB系统启动状态,对升级包进行校验,确保升级包合法有效;然后从升级包中解析出升级的可执行程序,创建子进程并启动升级程序,完成对AB系统主备分区的升级。具体升级的动作由升级脚本控制。|
|系统账号|[account_os_account](https://gitee.com/openharmony/account_os_account)|提供系统帐号生命周期管理,包括系统帐号的创建、切换、删除、查询和修改。
提供应用帐号的管理和应用账号OAuth鉴权能力,提供分布式帐号状态管理能力。|
|无障碍|[accessibility](https://gitee.com/openharmony/accessibility)|提供在应用程序和辅助应用之间交换信息的机制,支持辅助应用开发框架,增强无障碍功能体验。|
diff --git a/sig/sigs.json b/sig/sigs.json
index 3b45ff212b8427a22cf5e31e0015e7441f26a503..ce58675613ed4bcf6478f9bbadbec0b5b94e4641 100644
--- a/sig/sigs.json
+++ b/sig/sigs.json
@@ -501,6 +501,7 @@
"https://gitee.com/openharmony/update_packaging_tools",
"https://gitee.com/openharmony/update_updater",
"https://gitee.com/openharmony/update_updateservice",
+ "https://gitee.com/openharmony-sig/update_sys_installer",
"https://gitee.com/openharmony/third_party_bzip2",
"https://gitee.com/openharmony/third_party_lz4",
"https://gitee.com/openharmony/time_time_service",
@@ -569,6 +570,7 @@
"base/update/packaging_tools",
"base/update/updater",
"base/update/updateservice",
+ "base/update/sys_installer",
"third_party/bzip2",
"third_party/lz4",
"base/time/time_service",