diff --git a/x2paddle/convert.py b/x2paddle/convert.py
index a5aab534ec0916ce236f069bbb9e8f6d2695da80..f9b7384a9cb978d0e321d9a8c6655c1ae40b1e17 100644
--- a/x2paddle/convert.py
+++ b/x2paddle/convert.py
@@ -110,6 +110,17 @@ def onnx2paddle(model_path, save_dir):
     except:
         print("onnx is not installed, use \"pip install onnx==1.5.0\".")
         return
+    try:
+        import torch
+        version = torch.__version__
+        if '1.1.0' not in version:
+            print("your model have dynamic graph, torch==1.1.0 is required")
+            return
+        except:
+            print(
+                "your model have dynamic graph, we use caff2 to inference graph, please use \"pip install torch==1.1.0\"."
+            )
+            return
     print("Now translating model from onnx to paddle.")
 
     from x2paddle.decoder.onnx_decoder import ONNXDecoder