diff --git a/docs/source/sls/algorithm.rst b/docs/source/sls/algorithm.rst
index c5393346cce7b71b7168167a7244e4f2b475d0ce..260a027c7baad22d9c39e7d42947fd8001082dfa 100644
--- a/docs/source/sls/algorithm.rst
+++ b/docs/source/sls/algorithm.rst
@@ -59,7 +59,9 @@ Output
 Data Calibration Steps
 ``````````````````
 仪器效应改正包括以下步骤：
+
 **DQ Initialization**
+class： csst_ms_sls_instrument.steps.DQIstep