diff --git a/docs/algo_docs/impala/index.rst b/docs/algo_docs/impala/index.rst
index c16a9e7e77d60ae964dbdd2a22bb3482fcbca8ce..1a8b2a71c37d3d6cd059bb4fd1b7f9c109e31b32 100644
--- a/docs/algo_docs/impala/index.rst
+++ b/docs/algo_docs/impala/index.rst
@@ -5,4 +5,5 @@ Algorithms.impala
   :maxdepth: 1
 
   impala
-  vtrace
\ No newline at end of file
+  vtrace
+  
\ No newline at end of file
diff --git a/docs/algo_docs/index.rst b/docs/algo_docs/index.rst
index 51817c7c105566f5b9a74e5e33c13abe537f203e..8435f47e48eecc5379a0eac8e6e03e47b5205c48 100644
--- a/docs/algo_docs/index.rst
+++ b/docs/algo_docs/index.rst
@@ -9,4 +9,5 @@ PARL.Algorithms
   ddpg
   dqn
   policy_gradient
-  ppo
\ No newline at end of file
+  ppo
+  
\ No newline at end of file
diff --git a/docs/conf.py b/docs/conf.py
index 489cabc9d1e29d119b54c3a6bb6905900c392d42..1371d20d9c542b58ee7b53e098bd283478850b64 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -35,8 +35,6 @@ import os
 import sys
 import parl
 autodoc_mock_imports = ['paddle']
-sys.path.insert(0, os.path.abspath('.'))
-sys.path.insert(0, os.path.abspath('..'))
 release = parl.__version__
 project = 'PARL'
 copyright = '2019, nlp-ol@baidu.com'