diff --git a/python/paddle/audio/backends/backend.py b/python/paddle/audio/backends/backend.py
index f10c291a54f30c1532ccf5702f48246cc0553544..376a8af740639a28fe31f08ddff307994ec95137 100644
--- a/python/paddle/audio/backends/backend.py
+++ b/python/paddle/audio/backends/backend.py
@@ -48,20 +48,20 @@ def info(filepath: str) -> AudioInfo:
     Example:
         .. code-block:: python
 
-            import os
-            import paddle
-
-            sample_rate = 16000
-            wav_duration = 0.5
-            num_channels = 1
-            num_frames = sample_rate * wav_duration
-            wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
-            waveform = wav_data.tile([num_channels, 1])
-            base_dir = os.getcwd()
-            filepath = os.path.join(base_dir, "test.wav")
-
-            paddle.audio.save(filepath, waveform, sample_rate)
-            wav_info = paddle.audio.info(filepath)
+            >>> import os
+            >>> import paddle
+
+            >>> sample_rate = 16000
+            >>> wav_duration = 0.5
+            >>> num_channels = 1
+            >>> num_frames = sample_rate * wav_duration
+            >>> wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
+            >>> waveform = wav_data.tile([num_channels, 1])
+            >>> base_dir = os.getcwd()
+            >>> filepath = os.path.join(base_dir, "test.wav")
+
+            >>> paddle.audio.save(filepath, waveform, sample_rate)
+            >>> wav_info = paddle.audio.info(filepath)
     """
     # for API doc
     raise NotImplementedError("please set audio backend")
@@ -92,20 +92,20 @@ def load(
     Examples:
         .. code-block:: python
 
-            import os
-            import paddle
+            >>> import os
+            >>> import paddle
 
-            sample_rate = 16000
-            wav_duration = 0.5
-            num_channels = 1
-            num_frames = sample_rate * wav_duration
-            wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
-            waveform = wav_data.tile([num_channels, 1])
-            base_dir = os.getcwd()
-            filepath = os.path.join(base_dir, "test.wav")
+            >>> sample_rate = 16000
+            >>> wav_duration = 0.5
+            >>> num_channels = 1
+            >>> num_frames = sample_rate * wav_duration
+            >>> wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
+            >>> waveform = wav_data.tile([num_channels, 1])
+            >>> base_dir = os.getcwd()
+            >>> filepath = os.path.join(base_dir, "test.wav")
 
-            paddle.audio.save(filepath, waveform, sample_rate)
-            wav_data_read, sr = paddle.audio.load(filepath)
+            >>> paddle.audio.save(filepath, waveform, sample_rate)
+            >>> wav_data_read, sr = paddle.audio.load(filepath)
     """
     # for API doc
     raise NotImplementedError("please set audio backend")
@@ -138,17 +138,17 @@ def save(
     Examples:
         .. code-block:: python
 
-            import paddle
+            >>> import paddle
 
-            sample_rate = 16000
-            wav_duration = 0.5
-            num_channels = 1
-            num_frames = sample_rate * wav_duration
-            wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
-            waveform = wav_data.tile([num_channels, 1])
-            filepath = "./test.wav"
+            >>> sample_rate = 16000
+            >>> wav_duration = 0.5
+            >>> num_channels = 1
+            >>> num_frames = sample_rate * wav_duration
+            >>> wav_data = paddle.linspace(-1.0, 1.0, num_frames) * 0.1
+            >>> waveform = wav_data.tile([num_channels, 1])
+            >>> filepath = "./test.wav"
 
-            paddle.audio.save(filepath, waveform, sample_rate)
+            >>> paddle.audio.save(filepath, waveform, sample_rate)
     """
     # for API doc
     raise NotImplementedError("please set audio backend")