diff --git a/x2paddle/op_mapper/onnx_custom_layer/__init__.py b/x2paddle/op_mapper/onnx_custom_layer/__init__.py
index 92460546809bea0bffd7a27a3b5b9163e1b79d7f..3c074350a63e9e24cf1eba441da5a420868b5bb7 100644
--- a/x2paddle/op_mapper/onnx_custom_layer/__init__.py
+++ b/x2paddle/op_mapper/onnx_custom_layer/__init__.py
@@ -16,7 +16,6 @@ from .register import get_registered_layers
 #custom layer import begins
 
 from . import InstanceNormalization
-from . import NonMaxSuppression
 #custom layer import ends
 
 custom_layers = get_registered_layers()