diff --git a/ci_scripts/check_api_cn.sh b/ci_scripts/check_api_cn.sh
index 691df1e655e..bbea52fc18f 100644
--- a/ci_scripts/check_api_cn.sh
+++ b/ci_scripts/check_api_cn.sh
@@ -3,11 +3,11 @@ set -x
 
 function install_paddle() {
     # try to download paddle, and install
+    PADDLE_WHL=https://paddle-fluiddoc-ci.bj.bcebos.com/python/dist/paddlepaddle_gpu-0.0.0-cp38-cp38-linux_x86_64.whl
     if [ ${BRANCH} = 'release/2.1' ] ; then
-        pip install https://paddle-fluiddoc-ci.bj.bcebos.com/python/dist/paddlepaddle_gpu-2.1.0-cp38-cp38-linux_x86_64.whl
-    else
-        pip install https://paddle-fluiddoc-ci.bj.bcebos.com/python/dist/paddlepaddle_gpu-0.0.0-cp38-cp38-linux_x86_64.whl
+        PADDLE_WHL=https://paddle-fluiddoc-ci.bj.bcebos.com/python/dist/paddlepaddle_gpu-2.1.0-cp38-cp38-linux_x86_64.whl
     fi
+    pip install --no-cache-dir -i https://mirror.baidu.com/pypi/simple ${PADDLE_WHL}
     # if failed, build paddle
     if [ $? -ne 0 ];then
         build_paddle