diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index bea6852..bd5792d 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -32,7 +32,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.11", "3.12"]
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
new file mode 100644
index 0000000..5da4a71
--- /dev/null
+++ b/.github/workflows/windows.yml
@@ -0,0 +1,37 @@
+name: CMake
+
+on:
+  push:
+    branches: [ test-windows ]
+  pull_request:
+    branches: [ test-windows ]
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
+    # You can convert this to a matrix build if you need cross-platform coverage.
+    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+    strategy:
+      matrix:
+        os: [ windows-latest ]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Download GmSSL
+      run: |
+        git clone -b 'v3.1.1' --depth 1 https://github.com/guanzhi/GmSSL.git
+
+    - uses: ilammy/msvc-dev-cmd@v1
+    - name: build gmssl
+      run: |
+        cd Gmssl && mkdir build && cd build
+        cmake .. -G "NMake Makefiles"
+        nmake
+        nmake test
+        namke install
+        gmssl version
\ No newline at end of file