diff --git a/fastdeploy/__init__.py b/fastdeploy/__init__.py
index 17858f7e9a9..f4b085f34fc 100644
--- a/fastdeploy/__init__.py
+++ b/fastdeploy/__init__.py
@@ -13,12 +13,16 @@
 # limitations under the License.
 from __future__ import absolute_import
 import logging
-from .fastdeploy_main import Frontend, Backend, FDDataType, TensorInfo, Device
-from .fastdeploy_runtime import *
 from . import fastdeploy_main as C
+from .fastdeploy_runtime import *
 from . import vision
 from .download import download, download_and_decompress
 
+Frontend = C.Frontend
+Backend = C.Backend
+FDDataType = C.FDDataType
+TensorInfo = C.TensorInfo
+Device = C.Device
 
 def TensorInfoStr(tensor_info):
     message = "TensorInfo(name : '{}', dtype : '{}', shape : '{}')".format(
@@ -103,5 +107,6 @@ def RuntimeOptionStr(runtime_option):
     message.strip("\n")
     message += ")"
     return message
+
 C.TensorInfo.__repr__ = TensorInfoStr
 C.RuntimeOption.__repr__ = RuntimeOptionStr
diff --git a/fastdeploy/fastdeploy_runtime.py b/fastdeploy/fastdeploy_runtime.py
index e07e28993bc..0a31bdac5b5 100644
--- a/fastdeploy/fastdeploy_runtime.py
+++ b/fastdeploy/fastdeploy_runtime.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 from __future__ import absolute_import
 import logging
-from . import fastdeploy_main as C
+from . import C
 
 
 class FastDeployModel:
diff --git a/fastdeploy/vision/deepcam/__init__.py b/fastdeploy/vision/deepcam/__init__.py
index 6b1af4328b5..691497883c5 100644
--- a/fastdeploy/vision/deepcam/__init__.py
+++ b/fastdeploy/vision/deepcam/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import C
 
 
 class YOLOv5Face(FastDeployModel):
diff --git a/fastdeploy/vision/megvii/__init__.py b/fastdeploy/vision/megvii/__init__.py
index 8f96c974284..d8b8e7a20f5 100644
--- a/fastdeploy/vision/megvii/__init__.py
+++ b/fastdeploy/vision/megvii/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import C
 
 
 class YOLOX(FastDeployModel):
diff --git a/fastdeploy/vision/meituan/__init__.py b/fastdeploy/vision/meituan/__init__.py
index 7b6635dd368..077c4c099df 100644
--- a/fastdeploy/vision/meituan/__init__.py
+++ b/fastdeploy/vision/meituan/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import C
 
 
 class YOLOv6(FastDeployModel):
diff --git a/fastdeploy/vision/ppcls/__init__.py b/fastdeploy/vision/ppcls/__init__.py
index 7eb2bd4624f..fa1d541f780 100644
--- a/fastdeploy/vision/ppcls/__init__.py
+++ b/fastdeploy/vision/ppcls/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import C
 
 
 class Model(FastDeployModel):
diff --git a/fastdeploy/vision/ppdet/__init__.py b/fastdeploy/vision/ppdet/__init__.py
index 661ef0e1fcd..c3090a648db 100644
--- a/fastdeploy/vision/ppdet/__init__.py
+++ b/fastdeploy/vision/ppdet/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import C
 
 
 class PPYOLOE(FastDeployModel):
diff --git a/fastdeploy/vision/ppseg/__init__.py b/fastdeploy/vision/ppseg/__init__.py
index b580c014556..480f571712f 100644
--- a/fastdeploy/vision/ppseg/__init__.py
+++ b/fastdeploy/vision/ppseg/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import C
 
 
 class Model(FastDeployModel):
diff --git a/fastdeploy/vision/rangilyu/__init__.py b/fastdeploy/vision/rangilyu/__init__.py
index f2e8ace9fcb..2825db8ba68 100644
--- a/fastdeploy/vision/rangilyu/__init__.py
+++ b/fastdeploy/vision/rangilyu/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import C
 
 
 class NanoDetPlus(FastDeployModel):
diff --git a/fastdeploy/vision/ultralytics/__init__.py b/fastdeploy/vision/ultralytics/__init__.py
index 4dcd0d6d458..227795354bc 100644
--- a/fastdeploy/vision/ultralytics/__init__.py
+++ b/fastdeploy/vision/ultralytics/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import C
 
 
 class YOLOv5(FastDeployModel):
diff --git a/fastdeploy/vision/visualize/__init__.py b/fastdeploy/vision/visualize/__init__.py
index ea836b68ead..c3e85df9111 100644
--- a/fastdeploy/vision/visualize/__init__.py
+++ b/fastdeploy/vision/visualize/__init__.py
@@ -14,7 +14,7 @@
 
 from __future__ import absolute_import
 import logging
-from ... import fastdeploy_main as C
+from ... import C
 
 
 def vis_detection(im_data, det_result, line_size=1, font_size=0.5):
diff --git a/fastdeploy/vision/wongkinyiu/__init__.py b/fastdeploy/vision/wongkinyiu/__init__.py
index c1a3d37f7f7..86f0467ef05 100644
--- a/fastdeploy/vision/wongkinyiu/__init__.py
+++ b/fastdeploy/vision/wongkinyiu/__init__.py
@@ -15,7 +15,7 @@
 from __future__ import absolute_import
 import logging
 from ... import FastDeployModel, Frontend
-from ... import fastdeploy_main as C
+from ... import as C
 
 
 class YOLOv7(FastDeployModel):