diff --git a/ci_scripts/doc-build-config/en/conf.py b/ci_scripts/doc-build-config/en/conf.py
index 07d7541a264..9a9e8620d58 100644
--- a/ci_scripts/doc-build-config/en/conf.py
+++ b/ci_scripts/doc-build-config/en/conf.py
@@ -5,7 +5,6 @@
 # sys.path.insert(0, os.path.abspath('@PADDLE_BINARY_DIR@/python'))
 import shlex
 from recommonmark import parser, transform
-import sys
 import inspect
 import ast
 import time