diff --git a/.github/workflows/build_x86_64_musa.yaml b/.github/workflows/build_x86_64_musa.yaml
new file mode 100644
index 0000000000..1b458f748f
--- /dev/null
+++ b/.github/workflows/build_x86_64_musa.yaml
@@ -0,0 +1,131 @@
+# Copyright 2026 The xLLM Authors. All Rights Reserved.
+#
+# 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
+#
+#     https://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.
+
+name: xLLM Build x86_64 MUSA
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+    paths-ignore:
+      - 'docs/**'
+      - 'tools/**'
+      - '*.md'
+      - '*.txt'
+      - '*.yml'
+  pull_request:
+    branches: [main]
+    paths-ignore:
+      - 'docs/**'
+      - 'tools/**'
+      - '*.md'
+      - '*.txt'
+      - '*.yml'
+  pull_request_review:
+    types: [submitted]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+jobs:
+  check-sensitive:
+    runs-on: [xllm-cpu-only-cicd]
+    outputs:
+      do_build: ${{ steps.decide.outputs.do_build }}
+    steps:
+      - name: Checkout code
+        if: github.event_name == 'pull_request' || github.event_name == 'pull_request_review'
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+
+      - name: Check if sensitive files were changed
+        id: check_sensitive
+        if: github.event_name == 'pull_request' || github.event_name == 'pull_request_review'
+        run: |
+          requires_approval=false
+          while IFS= read -r changed_file; do
+            case "${changed_file}" in
+              .github/**|cibuild/**|setup.py|examples/generate.py)
+                requires_approval=true
+                break
+                ;;
+            esac
+          done < <(
+            git diff --name-only \
+              "${{ github.event.pull_request.base.sha }}" \
+              "${{ github.event.pull_request.head.sha }}"
+          )
+          echo "requires_approval=${requires_approval}" >> "${GITHUB_OUTPUT}"
+
+      - name: Decide whether to build
+        id: decide
+        run: |
+          event="${{ github.event_name }}"
+          requires_approval="${{ steps.check_sensitive.outputs.requires_approval }}"
+          do_build=false
+          if [[ "${event}" == "workflow_dispatch" || "${event}" == "push" ]]; then
+            do_build=true
+          elif [[ "${event}" == "pull_request" &&
+                  "${requires_approval}" != "true" ]]; then
+            do_build=true
+          elif [[ "${event}" == "pull_request_review" ]]; then
+            association="${{ github.event.review.author_association }}"
+            review_state="${{ github.event.review.state }}"
+            review_commit="${{ github.event.review.commit_id }}"
+            head_sha="${{ github.event.pull_request.head.sha }}"
+            if [[ "${requires_approval}" == "true" &&
+                  "${review_state}" == "approved" &&
+                  "${review_commit}" == "${head_sha}" &&
+                  ("${association}" == "OWNER" ||
+                   "${association}" == "MEMBER" ||
+                   "${association}" == "COLLABORATOR") ]]; then
+              do_build=true
+            fi
+          fi
+          echo "do_build=${do_build}" >> "${GITHUB_OUTPUT}"
+
+  build:
+    needs: check-sensitive
+    if: needs.check-sensitive.outputs.do_build == 'true'
+    runs-on: [xllm-musa-x86-cicd]
+    timeout-minutes: 120
+    steps:
+      - name: Prepare vcpkg cache
+        run: mkdir -p /export/home/musa_vcpkg_cache/archives /export/home/musa_vcpkg_cache/downloads
+
+      - name: Prepare submodule checkout
+        run: |
+          if [ -d .git/modules ]; then
+            find .git/modules -type f -name '*.lock' -print -delete || true
+          fi
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+        timeout-minutes: 10
+        with:
+          persist-credentials: false
+          submodules: recursive
+
+      - name: Clean submodules
+        run: git submodule foreach --recursive git clean -ffdx
+
+      - name: Build Python package
+        run: bash ./cibuild/build_musa.sh 'python setup.py build --device musa'
diff --git a/cibuild/build_musa.sh b/cibuild/build_musa.sh
new file mode 100755
index 0000000000..f0478a09d1
--- /dev/null
+++ b/cibuild/build_musa.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+# Copyright 2026 The xLLM Authors. All Rights Reserved.
+#
+# 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
+#
+#     https://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.
+
+set -e
+
+IMAGE="registry.mthreads.com/presale/devtech/xllm:musa-cicd-20260820"
+COMMAND="unset VCPKG_ROOT VCPKG_BINARY_SOURCES DEPENDENCES_ROOT FETCHCONTENT_SOURCE_DIR_VCPKG CMAKE_TOOLCHAIN_FILE
+export VCPKG_DEFAULT_BINARY_CACHE=/root/.cache/vcpkg/archives
+export VCPKG_DOWNLOADS=/root/.cache/vcpkg/downloads
+$*"
+
+docker run \
+  --rm \
+  --runtime=mthreads \
+  --network=host \
+  --env "GITHUB_WORKSPACE=${PWD}" \
+  --env MAX_JOBS=16 \
+  --env "CMAKE_ARGS=-DCMAKE_CUDA_COMPILER=/usr/local/musa/tools/musamapping/mcc_wrapper -DCMAKE_MODULE_PATH=/usr/local/musa/tools/musamapping/cmake/Modules" \
+  --env "XLLM_HOST_GID=$(id -g)" \
+  --env "XLLM_HOST_UID=$(id -u)" \
+  --volume "${PWD}:${PWD}" \
+  --volume /export/home/musa_vcpkg_cache:/root/.cache/vcpkg \
+  --workdir "${PWD}" \
+  --entrypoint /usr/local/bin/run-xllm-musa-ci \
+  "${IMAGE}" run "${COMMAND}"
diff --git a/third_party/CMakeLists.txt b/third_party/CMakeLists.txt
index 6571ff2c58..5e4ca1598d 100644
--- a/third_party/CMakeLists.txt
+++ b/third_party/CMakeLists.txt
@@ -4,6 +4,10 @@ add_subdirectory(sentencepiece)
 add_subdirectory(minja)
 add_subdirectory(brpc)
 add_subdirectory(smhasher/src)
+if(USE_MUSA AND TARGET SMHasherSupport)
+  # SMHasher uses the deprecated register storage class in SpeedTest.cpp.
+  target_compile_options(SMHasherSupport PRIVATE -Wno-register)
+endif()
 add_subdirectory(cpprestsdk)
 if(USE_MUSA AND TARGET cpprest)
   # mcc_wrapper diagnoses signed conversions in cpprestsdk headers more