diff --git a/README.md b/README.md
index 8e70735..55678c5 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,31 @@
-#
+# purge-jsdelivr-for-directory
 
-## Project function
+## Action function
+
+Refresh the cache of jsdelivr for a folder in the current repository
+
+## Usage
+
+### Example
+
+```yaml
+name: refresh jsdelivr
+run-name: 'refresh jsdelivr'
+on:
+  push:
+  workflow_dispatch:
+
+jobs:
+  refresh-jsdelivr:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Purge jsDelivr cache
+        uses: bling-yshs/purge-jsdelivr-for-directory@v1.0
+        with:
+          path: |
+            rules
+```
+
+### Example repository
+
+[custom-clash-rule](https://github.com/bling-yshs/custom-clash-rule)