diff --git a/deploy/bevformer/python/infer_evaluate.py b/deploy/bevformer/python/infer_evaluate.py
index ae9df1b0..2c08248d 100644
--- a/deploy/bevformer/python/infer_evaluate.py
+++ b/deploy/bevformer/python/infer_evaluate.py
@@ -21,7 +21,7 @@
 import paddle
 from paddle import inference
 
-from paddle3d.ops import ms_deform_attn
+from paddle3d.ops.ms_deform_attn import ms_deform_attn
 from paddle3d.apis.config import Config
 from paddle3d.apis.trainer import Trainer
 from paddle3d.slim import get_qat_config
diff --git a/paddle3d/models/detection/bevformer/bevformer.py b/paddle3d/models/detection/bevformer/bevformer.py
index 44182c4c..e4216488 100644
--- a/paddle3d/models/detection/bevformer/bevformer.py
+++ b/paddle3d/models/detection/bevformer/bevformer.py
@@ -354,7 +354,7 @@ def export(self, save_dir: str, **kwargs):
         input_spec = [image_spec, pre_bev_spec, img_metas_spec]
 
         paddle.jit.to_static(self, input_spec=input_spec)
-        if self.is_quant_model:
+        if self.is_quant_model():
             self.qat.save_quantized_model(
                 model=self,
                 path=os.path.join(save_dir, "bevformer_inference"),