diff --git a/paddlespeech/server/engine/tts/paddleinference/tts_engine.py b/paddlespeech/server/engine/tts/paddleinference/tts_engine.py
index 2cc16454d..2878c852b 100644
--- a/paddlespeech/server/engine/tts/paddleinference/tts_engine.py
+++ b/paddlespeech/server/engine/tts/paddleinference/tts_engine.py
@@ -22,7 +22,6 @@ import librosa
 import numpy as np
 import paddle
 import soundfile as sf
-# from scipy.io import wavfile
 
 from paddlespeech.cli.log import logger
 from paddlespeech.cli.tts.infer import TTSExecutor
@@ -409,7 +408,6 @@ class PaddleTTSConnectionHandler(TTSServerExecutor):
 
         # wav to base64
         buf = io.BytesIO()
-        # wavfile.write(buf, target_fs, wav_speed)
         sf.write(buf, wav_speed, target_fs, format="wav")
         buf.seek(0)
         base64_bytes = base64.b64encode(buf.read())
diff --git a/paddlespeech/server/engine/tts/python/tts_engine.py b/paddlespeech/server/engine/tts/python/tts_engine.py
index 3d525a4ea..356962bdd 100644
--- a/paddlespeech/server/engine/tts/python/tts_engine.py
+++ b/paddlespeech/server/engine/tts/python/tts_engine.py
@@ -20,7 +20,6 @@ import librosa
 import numpy as np
 import paddle
 import soundfile as sf
-# from scipy.io import wavfile
 
 from paddlespeech.cli.log import logger
 from paddlespeech.cli.tts.infer import TTSExecutor
@@ -173,7 +172,6 @@ class PaddleTTSConnectionHandler(TTSServerExecutor):
 
         # wav to base64
         buf = io.BytesIO()
-        # wavfile.write(buf, target_fs, wav_speed)
         sf.write(buf, wav_speed, target_fs, format="wav")
         buf.seek(0)