diff --git a/csst_dfs_api/facility/level1.py b/csst_dfs_api/facility/level1.py
index dd0ad19173c6b7941317d9aefbb42d039cc965e2..fcab769e48c7087a7e6081e65cc80fc9c810e6e6 100644
--- a/csst_dfs_api/facility/level1.py
+++ b/csst_dfs_api/facility/level1.py
@@ -13,20 +13,21 @@ class Level1DataApi(object):
         ''' retrieve level1 records from database
 
         :param kwargs: Parameter dictionary, key items support:
+            obs_id: [str]
             level0_id: [str]
             module_id: [str]
             data_type: [str]
-            create_time : (start, end),
-            qc1_status : [int],
-            prc_status : [int],
+            create_time : (start, end)
+            qc1_status : [int]
+            prc_status : [int]
             filename: [str]
-            ra_cen: float = None,
+            ra_cen: float = None
             dec_cen: float = None,
-            radius_cen: float = None,    
-            pipeline_id: [str],
-            detector_no: [str],
-            filter: [str],
-            object_name: [str],
+            radius_cen: float = None
+            pipeline_id: [str]
+            detector_no: [str]
+            filter: [str]
+            object_name: [str]
             limit: limits returns the number of records,default 0:no-limit
         
         :returns: csst_dfs_common.models.Result