diff --git a/Nodejs12.16-COSCdnRefresh/config.json b/Nodejs12.16-COSCdnRefresh/config.json
index eaafd6546..9299ec871 100644
--- a/Nodejs12.16-COSCdnRefresh/config.json
+++ b/Nodejs12.16-COSCdnRefresh/config.json
@@ -2,7 +2,7 @@
 	"serverless-cloud-function-application": {
 		"Chinese": {
 			"name": "CDN缓存刷新",
-			"description": "本示例使用COS触发器，完成CDN缓存刷新",
+			"description": "本示例使用COS触发器，完成CDN缓存刷新，CDN 域名可通过环境变量 cdnHosts* 批量指定",
 			"attention": "",
 			"author": {
 				"name": "腾讯云社区开发者"
diff --git a/Nodejs12.16-COSCdnRefresh/serverless.yml b/Nodejs12.16-COSCdnRefresh/serverless.yml
index 5930fb81c..ff5bb8e69 100644
--- a/Nodejs12.16-COSCdnRefresh/serverless.yml
+++ b/Nodejs12.16-COSCdnRefresh/serverless.yml
@@ -11,3 +11,6 @@ inputs:
   asyncRunEnable: TRUE
   traceEnable: TRUE
   timeout: 86400
+  environment:
+    variables:
+      cdnHosts1: cdnHosts1.example.com