diff --git a/llvm-build/README.md b/llvm-build/README.md
index 469398843e41144ce9c47f2cbb8e4b41fdaf2e5c..f13e8a2feb81dd06ac94b6a2eeab5d5c39da9543 100644
--- a/llvm-build/README.md
+++ b/llvm-build/README.md
@@ -203,3 +203,17 @@ Despite all the components provided by LLVM community, we included several tripl
 
 For detailed definition of Small System and Standard System, please refer to [System Types](https://gitee.com/openharmony/docs/blob/master/en/device-dev/Readme-EN.md).
 
+### Testing musl libc
+
+Toolchain build process includes musl libc build. libc.so is available in sysroot.
+Sometimes it's needed to build libc tests.
+
+Here is an example of starting build process on Linux:
+```
+# build
+python3 ./toolchain/llvm-project/llvm-build/build-libc-test.py
+```
+
+When build successfully completed, artifacts will be available in `out/llvm_build/musl` directory, including test libraries, libc tests and musl_unittest.
+Scripts to execute libc tests could be found in `third_party/musl/scripts` directory.
+For detailed information about musl, please refer to [third_party_musl](https://gitee.com/openharmony/third_party_musl).
diff --git a/llvm-build/build-libc-test.py b/llvm-build/build-libc-test.py
new file mode 100755
index 0000000000000000000000000000000000000000..13be68413d4b3a8f5e0c493de3c5e1679c6ce7d7
--- /dev/null
+++ b/llvm-build/build-libc-test.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+# Copyright (C) 2024 Huawei Device Co., Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+from build import BuildConfig, SysrootComposer
+
+def main():
+    print('Start building musl libc tests')
+    build_config = BuildConfig()
+    sysroot_composer = SysrootComposer(build_config)
+
+    product_name = 'llvm_build'
+    target_cpu = 'arm64'
+    gn_args = ''
+
+    os.chdir(build_config.LLVM_BUILD_DIR)
+    sysroot_composer.run_hb_build(product_name, target_cpu, 'libctest', gn_args)
+    sysroot_composer.run_hb_build(product_name, target_cpu, 'libc_gtest', gn_args)
+
+
+if __name__ == "__main__":
+    main()
+
+
+