diff --git a/opencompass/openicl/icl_retriever/icl_mdl_retriever.py b/opencompass/openicl/icl_retriever/icl_mdl_retriever.py
index 43fe12d1..f92e1acf 100644
--- a/opencompass/openicl/icl_retriever/icl_mdl_retriever.py
+++ b/opencompass/openicl/icl_retriever/icl_mdl_retriever.py
@@ -141,6 +141,7 @@ class MDLRetriever(TopkRetriever):
         """Retrieve the in-context example index for each test example."""
         return self.topk_search()
 
+    @torch.no_grad()
     def cal_ce(self, input_texts: List[str], mask_length=None):
         if self.metric_model is None:
             logger.info(