diff --git a/aio/deploy-cn.sh b/aio/deploy-cn.sh
index cc133d3a99..0e867b37a6 100755
--- a/aio/deploy-cn.sh
+++ b/aio/deploy-cn.sh
@@ -10,6 +10,9 @@ cd `dirname $0`
 
 yarn build
 ts-node ./tools/translator/bin/ssr.ts
+
+rm -fr ng-docs.github.io
+
 git clone git@github.com:ng-docs/ng-docs.github.io.git
 
 cp -r dist/* ./ng-docs.github.io/