diff --git a/source/source_io/module_parameter/input_parameter.h b/source/source_io/module_parameter/input_parameter.h
index 2222cd4c19..c4d1852769 100644
--- a/source/source_io/module_parameter/input_parameter.h
+++ b/source/source_io/module_parameter/input_parameter.h
@@ -123,8 +123,7 @@ struct Input_para
 
     bool lspinorb = false;   ///< consider the spin-orbit interaction
     bool noncolin = false;   ///< using non-collinear-spin
-    double soc_lambda = 1.0; ///< The fraction of averaged SOC pseudopotential
-                             ///< is given by (1-soc_lambda)
+    double soc_lambda = 1.0; ///< The fraction of SOC based on scalar relativity (SR) of the pseudopotential
 
     // ==============   #Parameters (3.LCAO) ===========================
     int nb2d = 0;                              ///< matrix 2d division.
diff --git a/source/source_io/read_input_item_elec_stru.cpp b/source/source_io/read_input_item_elec_stru.cpp
index 8daabfdc0e..1af097c405 100644
--- a/source/source_io/read_input_item_elec_stru.cpp
+++ b/source/source_io/read_input_item_elec_stru.cpp
@@ -716,8 +716,7 @@ void ReadInput::item_elec_stru()
     }
     {
         Input_Item item("soc_lambda");
-        item.annotation = "The fraction of averaged SOC pseudopotential is "
-                          "given by (1-soc_lambda)";
+        item.annotation = "The fraction of SOC based on scalar relativity (SR) of the pseudopotential";
         read_sync_double(input.soc_lambda);
         this->add_item(item);
     }
diff --git a/source/source_io/test/support/INPUT b/source/source_io/test/support/INPUT
index 5e70e8ef95..8460be22dc 100644
--- a/source/source_io/test/support/INPUT
+++ b/source/source_io/test/support/INPUT
@@ -36,7 +36,7 @@ mem_saver                      0 #Only for nscf calculations. if set to 1, then
 diago_proc                     4 #the number of procs used to do diagonalization
 nbspline                       -1 #the order of B-spline basis
 wannier_card                   none #input card for wannier functions
-soc_lambda                     1 #The fraction of averaged SOC pseudopotential is given by (1-soc_lambda)
+soc_lambda                     1 #The fraction of SOC based on scalar relativity (SR) of the pseudopotential
 cal_force                      0 #if calculate the force at the end of the electronic iteration
 out_freq_ion                   0 #the frequency ( >= 0 ) of ionic step to output charge density and wavefunction. 0: output only when ion steps are finished
 device                         cpu #the computing device for ABACUS