diff --git a/csst_dfs_api/facility/level0.py b/csst_dfs_api/facility/level0.py
index caad48b2e223529820e4b42cb48d2a629e79332b..029aa2c3d5406f56b4f7cb9ab9d4370bde7300c4 100644
--- a/csst_dfs_api/facility/level0.py
+++ b/csst_dfs_api/facility/level0.py
@@ -20,6 +20,7 @@ class Level0DataApi(object):
             file_type: [str],
             filter: [str],
             obs_time : (start, end),
+            create_time : (start, end),
             qc0_status : [int],
             prc_status : [int],
             file_name: [str],