diff --git a/python/paddle_fl/mpc/examples/mnist_demo/run_standalone.sh b/python/paddle_fl/mpc/examples/mnist_demo/run_standalone.sh
index fb9e7f71300b560697666be08c5701ad77650090..932d8cf6f4da9940fdf0d1099beaf12a03bf0791 100755
--- a/python/paddle_fl/mpc/examples/mnist_demo/run_standalone.sh
+++ b/python/paddle_fl/mpc/examples/mnist_demo/run_standalone.sh
@@ -68,13 +68,13 @@ if [ "$PRED_FILE" ]; then
         rm -rf $PRED_FILE
 fi
 
-PRED_FILE="/tmp/mnist2_feature.part*"
-if [ ! "$PRED_FILE" ]; then
+TRAINING_FILE="/tmp/mnist2_feature.part*"
+if [ ! "$TRAINING_FILE" ]; then
     echo "There is no data in /tmp, please prepare data with "python prepare.py" firstly"
     exit 1
 else
     echo "There are data for mnist:"
-    echo "`ls ${PRED_FILE}`"
+    echo "`ls ${TRAINING_FILE}`"
 fi