diff --git a/docs/api_cpp/source_en/lite.md b/docs/api_cpp/source_en/lite.md
index 26458a38eb1e0e2fb616bbee43b59fb48517cb6d..61ee990133dc195da807e0eeb28ab1efa789328b 100644
--- a/docs/api_cpp/source_en/lite.md
+++ b/docs/api_cpp/source_en/lite.md
@@ -117,7 +117,7 @@ An **enum** type. CpuBindMode defined for holding bind cpu strategy argument.
 ### Attributes
 
 ```cpp
-MID_CPU = -1
+MID_CPU = 2
 ```
 
 Bind middle cpu first.
diff --git a/docs/api_cpp/source_zh_cn/lite.md b/docs/api_cpp/source_zh_cn/lite.md
index b3aaa5909c268a82eb43b7717348816e55c501f3..46f1d5fd20cecd1f44e9695e4c7091d79863ae00 100644
--- a/docs/api_cpp/source_zh_cn/lite.md
+++ b/docs/api_cpp/source_zh_cn/lite.md
@@ -117,7 +117,7 @@ static Model *Import(const char *model_buf, size_t size)
 **属性**
 
 ```
-MID_CPU = -1
+MID_CPU = 2
 ```
 
 优先中等CPU绑定策略。