diff --git a/demos/text_to_speech/README.md b/demos/text_to_speech/README.md
index f25dc606..769189e3 100644
--- a/demos/text_to_speech/README.md
+++ b/demos/text_to_speech/README.md
@@ -1,5 +1,3 @@
-
-
 # TTS (Text To Speech)
 
 ## Introduction
@@ -18,29 +16,33 @@ Input of this demo should be a text of the specific language that can be passed
 ### 3. Usage
 - Command Line (Recommended)
     - Chinese
-    ```bash
-    paddlespeech tts --input "你好，欢迎使用百度飞桨深度学习框架！"
-    ```
-    The default acoustic model is `Fastspeech2`, and the default vocoder is `Parallel WaveGAN`.
-      - Chinese, use `SpeedySpeech` as acoustic model
-    ```bash
-    paddlespeech tts --am speedyspeech_csmsc --input "你好，欢迎使用百度飞桨深度学习框架！"
-    ```
+    
+        The default acoustic model is `Fastspeech2`, and the default vocoder is `Parallel WaveGAN`.
+        ```bash
+        paddlespeech tts --input "你好，欢迎使用百度飞桨深度学习框架！"
+        ```
+    - Chinese, use `SpeedySpeech` as acoustic model
+        ```bash
+        paddlespeech tts --am speedyspeech_csmsc --input "你好，欢迎使用百度飞桨深度学习框架！"
+        ```
     - Chinese, multi speaker
-    ```bash
-    paddlespeech tts --am fastspeech2_aishell3 --voc pwgan_aishell3 --input "你好，欢迎使用百度飞桨深度学习框架！" --spk_id 0
-    ```
-    You can change `spk_id` here.
+    
+        You can change `spk_id` here.
+        ```bash
+        paddlespeech tts --am fastspeech2_aishell3 --voc pwgan_aishell3 --input "你好，欢迎使用百度飞桨深度学习框架！" --spk_id 0
+        ```
+    
      - English
-    ```bash
-    paddlespeech tts --am fastspeech2_ljspeech --voc pwgan_ljspeech --lang en --input "hello world"
-    ```
+        ```bash
+        paddlespeech tts --am fastspeech2_ljspeech --voc pwgan_ljspeech --lang en --input "hello world"
+        ```
     - English, multi speaker
-    ```bash
+    
+        You can change `spk_id` here.
+        ```bash
         paddlespeech tts --am fastspeech2_vctk --voc pwgan_vctk --input "hello, boys" --lang en --spk_id 0
-    ```
-    You can change `spk_id` here.
- Usage:
+        ```   
+  Usage:
   
   ```bash
   paddlespeech tts --help