diff --git a/doc/custom_reader.md b/doc/custom_reader.md
index 1983ed29e1603e46cceeb128f8cd55396cc6f0ad..c392a5ea53c0da59492956a7c64cd13627dcb36a 100644
--- a/doc/custom_reader.md
+++ b/doc/custom_reader.md
@@ -93,7 +93,7 @@ Reader的逻辑需要一个单独的python文件进行描述。我们试写一
 
     ```yaml
     ...
-    train:
+    hyper_parameters:
         reader:
             avg: 10
     ...