diff --git a/paddlespeech/cli/asr/infer.py b/paddlespeech/cli/asr/infer.py
index d6489f6d0..c99e57b81 100644
--- a/paddlespeech/cli/asr/infer.py
+++ b/paddlespeech/cli/asr/infer.py
@@ -15,7 +15,7 @@ import argparse
 import os
 import sys
 import time
-from io import BytesIO
+import io 
 from collections import OrderedDict
 from typing import List
 from typing import Optional
@@ -230,7 +230,7 @@ class ASRExecutor(BaseExecutor):
         audio_file = input
         if isinstance(audio_file, (str, os.PathLike)):
             logger.debug("Preprocess audio_file:" + audio_file)
-        elif isinstance(audio_file, BytesIO):
+        elif isinstance(audio_file, io.BytesIO):
             audio_file.seek(0)
 
         # Get the object for feature extraction
@@ -355,7 +355,7 @@ class ASRExecutor(BaseExecutor):
             if not os.path.isfile(audio_file):
                 logger.error("Please input the right audio file path")
                 return False
-        elif isinstance(audio_file, BytesIO):
+        elif isinstance(audio_file, io.BytesIO):
             audio_file.seek(0)
 
         logger.debug("checking the audio file format......")