diff --git a/docs/source/sls/algorithm.rst b/docs/source/sls/algorithm.rst
index 64aec573d2bf4d065baea3747789db7d813274bf..de0031b4a86f2fe59dbb335a0b2d8c71310ee787 100644
--- a/docs/source/sls/algorithm.rst
+++ b/docs/source/sls/algorithm.rst
@@ -23,6 +23,7 @@ Instrument correction
 .. _DataModel: https://csst-tb.bao.ac.cn/code/csst-l1/csst-l1doc/-/blob/main/docs/source/sls/data_model.md
 
 CSST无缝光谱的1级数据产品是三个扩展的fits文件，扩展内容如下表所示：
+
 +-----------------+---------+-------------------+
 | Extension Name  |  bunit  | comment           |
 +=================+=========+===================+
@@ -33,6 +34,7 @@ CSST无缝光谱的1级数据产品是三个扩展的fits文件，扩展内容
 | DQ              | unitless| data quality array|
 +-----------------+---------+-------------------+
 
+
 Position calibration
 ---------------------