diff --git a/thirdparty/libtommath/HPKBUILD b/thirdparty/libtommath/HPKBUILD
new file mode 100644
index 0000000000000000000000000000000000000000..a0d37c6a5eb4b7012728fdce221e5d173526ad55
--- /dev/null
+++ b/thirdparty/libtommath/HPKBUILD
@@ -0,0 +1,72 @@
+# Contributor: wupingyuan <wupingyuan@huawei.com>
+# Maintainer: wupingyuan <wupingyuan@huawei.com>
+pkgname=libtommath
+pkgver=1.2.0
+pkgrel=0
+pkgdesc="This is the git repository for LibTomMath, a free open source portable number theoretic multiple-precision integer (MPI) library written entirely in C."
+url="https://github.com/libtom/libtommath"
+archs=("armeabi-v7a" "arm64-v8a")
+license=("public domain")
+depends=()
+makedepends=()
+install=
+source="https://github.com/libtom/$pkgname/archive/refs/tags/v$pkgver.tar.gz"
+
+autounpack=true
+downloadpackage=true
+buildtools="make"
+builddir=$pkgname-$pkgver
+packagename=$builddir.tar.gz
+cc=
+ar=
+ranlib=
+
+prepare() {
+    cp -rf $builddir $builddir-$ARCH-build
+    cd $builddir-$ARCH-build
+    ar=${OHOS_SDK}/native/llvm/bin/llvm-ar
+    ranlib=${OHOS_SDK}/native/llvm/bin/llvm-ranlib
+    if [ $ARCH == ${archs[0]} ]
+    then
+        cc=${OHOS_SDK}/native/llvm/bin/arm-linux-ohos-clang
+    fi
+    if [ $ARCH == ${archs[1]} ]
+    then
+        cc=${OHOS_SDK}/native/llvm/bin/aarch64-linux-ohos-clang
+    fi
+    cd $OLDPWD
+}
+
+build() {
+    cd $builddir-$ARCH-build
+    make CC=${cc} AR=${ar} RANLIB=${ranlib} -j4 > `pwd`/build.log 2>&1
+    ret=$?
+    cd $OLDPWD
+    return $ret
+}
+
+package() {
+    cd $builddir-$ARCH-build
+    make install PREFIX=$LYCIUM_ROOT/usr/$pkgname-$ARCH-install >> `pwd`/build.log 2>&1
+    ret=$?
+    cd $OLDPWD
+    return $ret
+}
+
+check() {
+    # 生成测试可执行文件
+    cd $builddir-$ARCH-build
+    make CC=${cc} test_standalone >> `pwd`/build.log 2>&1
+    ret=$?
+    unset cc ar ranlib
+    cd $OLDPWD
+    echo "The test must be on an OpenHarmony device!"
+    # 在OpenHarmony开发板中执行用例
+    # ./test
+    return $ret
+}
+
+# 清理环境
+cleanbuild(){
+    rm -rf ${PWD}/$builddir $builddir-armeabi-v7a-build  $builddir-arm64-v8a-build #${PWD}/$packagename
+}
\ No newline at end of file
diff --git a/thirdparty/libtommath/README.OpenSource b/thirdparty/libtommath/README.OpenSource
new file mode 100644
index 0000000000000000000000000000000000000000..7ec1ec22c80f6bf7c5cd989c51bce352b19e23ba
--- /dev/null
+++ b/thirdparty/libtommath/README.OpenSource
@@ -0,0 +1,11 @@
+[
+    {
+        "Name": "libtommath",
+        "License": "public domain",
+        "License File": "LICENSE",
+        "Version Number": "1.2.0",
+        "Owner": "wupingyuan@huawei.com",
+        "Upstream URL": "https://github.com/libtom/libtommath/archive/refs/tags/v1.2.0.tar.gz",
+        "Description": "This is the git repository for LibTomMath, a free open source portable number theoretic multiple-precision integer (MPI) library written entirely in C."
+    }
+]
diff --git a/thirdparty/libtommath/README_zh.md b/thirdparty/libtommath/README_zh.md
new file mode 100644
index 0000000000000000000000000000000000000000..8328689f8d2f8cb93bac6f81a3172d4298f69465
--- /dev/null
+++ b/thirdparty/libtommath/README_zh.md
@@ -0,0 +1,12 @@
+# libtommath三方库说明
+## 功能简介
+libtommath是一个完全用C语言编写的免费开源可移植数字理论多精度整数（MPI）库。
+## 使用约束
+- IDE版本：DevEco Studio 3.1 Release
+- SDK版本：ohos_sdk_public 3.2.11.9 (API Version 9 Release)
+- 三方库版本：1.2.0
+- 当前适配的功能：数字理论多精度整数
+- [BSD](https://github.com/libtom/libtommath)
+
+## 集成方式
++ [应用hap包集成](docs/hap_integrate.md)
diff --git a/thirdparty/libtommath/SHA512SUM b/thirdparty/libtommath/SHA512SUM
new file mode 100644
index 0000000000000000000000000000000000000000..72271855fd05cd3ed8317d3dad618a416f38796c
--- /dev/null
+++ b/thirdparty/libtommath/SHA512SUM
@@ -0,0 +1 @@
+500bce4467d6cdb0b014e6c66d3b994a8d63b51475db6c3cd77c15c8368fbab4e3b5c458fcd5b35838b74c457a33c15b42d2356964f5ef2a0bd31fd544735c9a  libtommath-1.2.0.tar.gz
diff --git a/thirdparty/libtommath/docs/hap_integrate.md b/thirdparty/libtommath/docs/hap_integrate.md
new file mode 100644
index 0000000000000000000000000000000000000000..a7ee9ee138ab3ea1dc672c7a5c7db85d9ee8ad6d
--- /dev/null
+++ b/thirdparty/libtommath/docs/hap_integrate.md
@@ -0,0 +1,67 @@
+# libtommath集成到应用hap
+本库是在RK3568开发板上基于OpenHarmony3.2 Release版本的镜像验证的，如果是从未使用过RK3568，可以先查看[润和RK3568开发板标准系统快速上手](https://gitee.com/openharmony-sig/knowledge_demo_temp/tree/master/docs/rk3568_helloworld)。
+## 开发环境
+- ubuntu20.04
+- [OpenHarmony3.2Release镜像](https://gitee.com/link?target=https%3A%2F%2Frepo.huaweicloud.com%2Fopenharmony%2Fos%2F3.2-Release%2Fdayu200_standard_arm32.tar.gz)
+- [ohos_sdk_public 3.2.11.9 (API Version 9 Release)](https://gitee.com/link?target=https%3A%2F%2Frepo.huaweicloud.com%2Fopenharmony%2Fos%2F3.2-Release%2Fohos-sdk-windows_linux-public.tar.gz)
+- [DevEco Studio 3.1 Beta2](https://gitee.com/link?target=https%3A%2F%2Fcontentcenter-vali-drcn.dbankcdn.cn%2Fpvt_2%2FDeveloperAlliance_package_901_9%2Ff3%2Fv3%2FuJyuq3syQ2ak4hE1QZmAug%2Fdevecostudio-windows-3.1.0.400.zip%3FHW-CC-KV%3DV1%26HW-CC-Date%3D20230408T013335Z%26HW-CC-Expire%3D315360000%26HW-CC-Sign%3D96262721EDC9B34E6F62E66884AB7AE2A94C2A7B8C28D6F7FC891F46EB211A70)
+- [准备三方库构建环境](../../../tools/README.md#编译环境准备)
+- [准备三方库测试环境](../../../tools/README.md#ci环境准备)
+## 编译三方库
+- 下载本仓库
+  ```
+  git clone https://gitee.com/openharmony-sig/tpc_c_cplusplus.git --depth=1
+  ```
+- 三方库目录结构
+  ```
+  tpc_c_cplusplus/thirdparty/libtommath  #三方库libtommath的目录结构如下
+  ├── docs                              #三方库相关文档的文件夹
+  ├── HPKBUILD                          #构建脚本
+  ├── SHA512SUM                         #三方库校验文件
+  ├── README.OpenSource                 #说明三方库源码的下载地址，版本，license等信息
+  ├── README_zh.md   
+  ```
+  
+- 将libtommath拷贝至tools/main目录下
+  ```
+  cd tpc_c_cplusplus
+  cp thirdparty/libtommath tools/main -rf
+  ```
+- 在tools目录下编译三方库
+  编译环境的搭建参考[准备三方库构建环境](../../../tools/README.md#编译环境准备)
+  ```
+  cd tools
+  ./build.sh libtommath
+  ```
+- 三方库头文件及生成的库
+  在tools目录下会生成usr目录，该目录下存在已编译完成的32位和64位三方库
+  ```
+  libtommath-arm64-v8a-install   libtommath-armeabi-v7a-install
+  ```
+
+- [测试三方库](#测试三方库)
+
+## 应用中使用三方库
+
+- 在IDE的cpp目录下新增thirdparty目录，将编译生成的库拷贝到该目录下，如下图所示
+&nbsp;![thirdparty_install_dir](pic/libtommath_install_dir.jpg)
+- 在最外层（cpp目录下）CMakeLists.txt中添加如下语句
+  ```
+  #将三方库加入工程中
+  target_link_libraries(entry PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/libtommath-${OHOS_ARCH}-install/lib/libtommath.a)   
+  #将三方库的头文件加入工程中
+  target_include_directories(entry PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/libtommath-${OHOS_ARCH}-install/include)
+  ```
+  ![libtommath_usage](pic/libtommath_usage.jpg)
+## 测试三方库
+三方库的测试使用原库自带的测试用例来做测试，[准备三方库测试环境](../../../tools/README.md#ci环境准备)
+
+进入到构建目录执行./test运行测试用例（arm64-v8a-build为构建64位的目录，armeabi-v7a-build为构建32位的目录）
+
+&nbsp;![libtommath_test](pic/libtommath_test.jpg)
+
+## 参考资料
+- [润和RK3568开发板标准系统快速上手](https://gitee.com/openharmony-sig/knowledge_demo_temp/tree/master/docs/rk3568_helloworld)
+- [OpenHarmony三方库地址](https://gitee.com/openharmony-tpc)
+- [OpenHarmony知识体系](https://gitee.com/openharmony-sig/knowledge)
+- [通过DevEco Studio开发一个NAPI工程](https://gitee.com/openharmony-sig/knowledge_demo_temp/blob/master/docs/napi_study/docs/hello_napi.md)
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