diff --git a/docs/source/sls/algorithm.rst b/docs/source/sls/algorithm.rst
index 8eb4d327d23814c2cb048c6d1eb06cd9923354e9..25b7158c416c511b941821ba6abab27614a9db70 100644
--- a/docs/source/sls/algorithm.rst
+++ b/docs/source/sls/algorithm.rst
@@ -59,8 +59,8 @@ Output
 Data Calibration Steps
 ``````````````````
 仪器效应改正包括以下步骤：
-DQ Initialization
-''''''''''''''''''
+    DQ Initialization
+    ''''''''''''''''''