diff --git a/docs/howto-build-aosp-riscv.md b/docs/howto-build-aosp-riscv.md
index 2240c2ebc2a19aa2d3a6ff712f90f168c9ae06c1..62b7f8f60fc5bb779c2f12420825e535688b6bf0 100644
--- a/docs/howto-build-aosp-riscv.md
+++ b/docs/howto-build-aosp-riscv.md
@@ -7,7 +7,8 @@
 - [3. Install repo](#3-install-repo)
 - [4. Download source code](#4-download-source-code)
 - [5. Build](#5-build)
-- [6. Build Clang](#6-build-clang)
+- [6. Build Clang llvm toolchain](#6-build-clang-llvm-toolchain)
+- [7. Build Rust toolchain](#7-build-rust-toolchain)
 
 <!-- /TOC -->
 
@@ -90,7 +91,7 @@ $ lunch aosp_riscv64-eng
 $ m --skip-ninja
 ```
 
-# 6. Build Clang
+# 6. Build Clang llvm toolchain
 
 ```
 $ mkdir llvm-toolchain && cd llvm-toolchain
@@ -98,3 +99,12 @@ $ repo init -u git@github.com:aosp-riscv/platform_manifest.git -b riscv64-llvm-m
 $ repo sync -c
 $ python toolchain/llvm_android/build.py
 ```
+
+# 7. Build Rust toolchain
+
+```
+$ mkdir rust-toolchain && cd rust-toolchain
+$ repo init -u git@github.com:riscv-android-src/manifest.git -b riscv64-android12-rust-toolchain-dev
+$ repo sync -c
+$ python toolchain-android_rust/build.py
+```
diff --git a/docs/zh/howto-build-aosp-riscv.md b/docs/zh/howto-build-aosp-riscv.md
index 00221f1426f832bd982d2c25f836cdfb5b50c165..aa5ae8a5568d2fef4ecf1758ce4c0f6af92f43e1 100644
--- a/docs/zh/howto-build-aosp-riscv.md
+++ b/docs/zh/howto-build-aosp-riscv.md
@@ -9,7 +9,8 @@
 - [3. 安装 repo](#3-安装-repo)
 - [4. 下载源码](#4-下载源码)
 - [5. 编译](#5-编译)
-- [6. 构建 Clang](#6-构建-clang)
+- [6. 构建 Clang llvm 工具链](#6-构建-clang-llvm-工具链)
+- [7. 构建 Rust 工具链](#7-构建-rust-工具链)
 
 <!-- /TOC -->
 
@@ -93,11 +94,20 @@ $ lunch aosp_riscv64-eng
 $ m --skip-ninja
 ```
 
-# 6. 构建 Clang
+# 6. 构建 Clang llvm 工具链
 
 ```
 $ mkdir llvm-toolchain && cd llvm-toolchain
 $ repo init -u git@github.com:aosp-riscv/platform_manifest.git -b riscv64-llvm-master
 $ repo sync -c
 $ python toolchain/llvm_android/build.py
+```
+
+# 7. 构建 Rust 工具链
+
+```
+$ mkdir rust-toolchain && cd rust-toolchain
+$ repo init -u git@github.com:riscv-android-src/manifest.git -b riscv64-android12-rust-toolchain-dev
+$ repo sync -c
+$ python toolchain-android_rust/build.py
 ```
\ No newline at end of file