diff --git a/server/apps/supervision/views.py b/server/apps/supervision/views.py
index 726506a..982b4df 100644
--- a/server/apps/supervision/views.py
+++ b/server/apps/supervision/views.py
@@ -613,6 +613,8 @@ class ImpMixin:
                 new_val = datetime.datetime.strptime(val, '%Y-%m-%d').date()
             except ValueError:
                 raise ParseError(f'第{ind}行, 日期时间格式错误')
+        elif val is None:
+            pass
         else:
             raise ParseError(f'第{ind}行, 日期时间格式错误')
         return new_val