diff --git a/python/federatedml/statistic/data_statistics.py b/python/federatedml/statistic/data_statistics.py
index c9613c8690..b53e1de3d0 100644
--- a/python/federatedml/statistic/data_statistics.py
+++ b/python/federatedml/statistic/data_statistics.py
@@ -182,7 +182,8 @@ def _convert_pb(self, stat_res, stat_name):
     def export_model(self):
         if self.model_output is not None:
             return self.model_output
-
+        if self.inner_param is None:
+            self.inner_param = StatisticInnerParam()
         meta_obj = self._get_meta()
         param_obj = self._get_param()
         result = {