diff --git a/modelscope/models/nlp/__init__.py b/modelscope/models/nlp/__init__.py
index c3baab15..f3dabb03 100644
--- a/modelscope/models/nlp/__init__.py
+++ b/modelscope/models/nlp/__init__.py
@@ -1,4 +1,3 @@
 from .sequence_classification_model import *  # noqa F403
-from .space.dialog_generation_model import *  # noqa F403
 from .space.dialog_intent_model import *  # noqa F403
 from .text_generation_model import *  # noqa F403
diff --git a/modelscope/pipelines/nlp/__init__.py b/modelscope/pipelines/nlp/__init__.py
index fe11e9a3..a3c0cccf 100644
--- a/modelscope/pipelines/nlp/__init__.py
+++ b/modelscope/pipelines/nlp/__init__.py
@@ -1,4 +1,3 @@
 from .sequence_classification_pipeline import *  # noqa F403
-from .space.dialog_generation_pipeline import *  # noqa F403
 from .space.dialog_intent_pipeline import *  # noqa F403
 from .text_generation_pipeline import *  # noqa F403
diff --git a/modelscope/preprocessors/__init__.py b/modelscope/preprocessors/__init__.py
index 5f473753..6ef4b3d1 100644
--- a/modelscope/preprocessors/__init__.py
+++ b/modelscope/preprocessors/__init__.py
@@ -6,5 +6,4 @@ from .common import Compose
 from .image import LoadImage, load_image
 from .nlp import *  # noqa F403
 from .nlp import TextGenerationPreprocessor
-from .space.dialog_generation_preprocessor import *  # noqa F403
 from .space.dialog_intent_preprocessor import *  # noqa F403