diff --git a/docs/source/sls/algorithm.rst b/docs/source/sls/algorithm.rst
index 8a4adf2ce7aa529faebbca7965bb68705c9cb7ac..7cf7419056b3e90813dc4215fd3139b4af379067 100644
--- a/docs/source/sls/algorithm.rst
+++ b/docs/source/sls/algorithm.rst
@@ -72,6 +72,26 @@ class： csst_ms_sls_instrument.steps.BiasCorrStep
 
 class： csst_ms_sls_instrument.steps.ToElectronsStep
 
+**Uncertainty Initialization**
+
+class: csst_ms_sls_instrument.steps.UncertaintyInitStep
+
+**Dark correction**
+
+class: csst_ms_sls_instrument.steps.DarkCorrStep
+
+**Flatfield correction**
+
+class: csst_ms_sls_instrument.steps.FlatCorrStep
+
+**CR rejection**
+
+class: csst_ms_sls_instrument.steps.CRrejStep
+
+**To electrons/sec**
+
+class: csst_ms_sls_instrument.steps.CPSStep
+
 
 Position calibration
 ---------------------