diff --git a/x2paddle/convert.py b/x2paddle/convert.py
index 5e23b010c4b44efb9c698388226001251d901c1d..24dd0fc837980d5397ef2d7a5d4bbac12b83809f 100644
--- a/x2paddle/convert.py
+++ b/x2paddle/convert.py
@@ -149,7 +149,9 @@ def onnx2paddle(model_path, save_dir):
     try:
         import onnx
         version = onnx.version.version
-        if version < '1.6.0':
+        v0, v1, v2 = version.split('.')
+        version_sum = int(v0) * 100 + int(v1) * 10 + int(v2)
+        if version_sum < 160:
             print("[ERROR] onnx>=1.6.0 is required")
             return
     except: