diff --git a/tests/benchmark/conformer/run_benchmark.sh b/tests/benchmark/conformer/run_benchmark.sh
index 16cd410e..ef9ef8ab 100644
--- a/tests/benchmark/conformer/run_benchmark.sh
+++ b/tests/benchmark/conformer/run_benchmark.sh
@@ -48,7 +48,8 @@ function _train(){
 
     case ${run_mode} in
     sp) train_cmd="python -u ${BIN_DIR}/train.py "${train_cmd} ;;
-    mp) train_cmd="python -u ${BIN_DIR}/train.py "${train_cmd} ;;
+    mp) rm -rf ./mylog
+        train_cmd="python -u ${BIN_DIR}/train.py "${train_cmd} ;;
     *) echo "choose run_mode(sp or mp)"; exit 1;
     esac
     echo ${train_cmd}
diff --git a/tests/benchmark/pwgan/run_benchmark.sh b/tests/benchmark/pwgan/run_benchmark.sh
index d6a52d35..b9cc154f 100755
--- a/tests/benchmark/pwgan/run_benchmark.sh
+++ b/tests/benchmark/pwgan/run_benchmark.sh
@@ -38,7 +38,8 @@ function _train(){
 
     case ${run_mode} in
     sp) train_cmd="python paddlespeech/t2s/exps/gan_vocoder/parallelwave_gan/train.py --ngpu=1 ${train_cmd}" ;;
-    mp) train_cmd="python paddlespeech/t2s/exps/gan_vocoder/parallelwave_gan/train.py --ngpu=8 ${train_cmd}"
+    mp) rm -rf ./mylog 
+        train_cmd="python paddlespeech/t2s/exps/gan_vocoder/parallelwave_gan/train.py --ngpu=8 ${train_cmd}"
         log_parse_file="mylog/workerlog.0" ;;
     *) echo "choose run_mode(sp or mp)"; exit 1;
     esac