diff --git a/demo/traffic_prediction/data/get_data.sh b/demo/traffic_prediction/data/get_data.sh
index 52cf6608df8b572125535d1d0de2caad10999d3a..716faac76f891be6f66c4ad81358b8657c042f89 100755
--- a/demo/traffic_prediction/data/get_data.sh
+++ b/demo/traffic_prediction/data/get_data.sh
@@ -27,8 +27,8 @@ wget http://paddlepaddle.bj.bcebos.com/demo/traffic/traffic_data.tar.gz
 echo "Unzipping..."
 tar -zxvf traffic_data.tar.gz
 
-echo "data/speeds.csv" >> train.list
-echo "data/speeds.csv" >> test.list
-echo "data/speeds.csv" >> pred.list
+echo "data/speeds.csv" > train.list
+echo "data/speeds.csv" > test.list
+echo "data/speeds.csv" > pred.list
 
 echo "Done."