diff --git a/tools/cal_pos_neg.py b/tools/cal_pos_neg.py
index 3f349aef2022181bace5dade79c898937be4783b..702bf1080f750b144ee7c776008919be7f1dc336 100644
--- a/tools/cal_pos_neg.py
+++ b/tools/cal_pos_neg.py
@@ -12,13 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #!/usr/bin/python  
-#-*- coding:utf-8 -*-  
-############################  
-#File Name: cal_pos_neg.py
-#Author: youqiheng 
-#Mail: youqiheng@baidu.com
-#Created Time: 2018-04-15 21:59:45
-############################ 
+#-*- coding:utf-8 -*-   
 """
 docstring
 """