diff --git a/x2paddle/op_mapper/caffe_op_mapper.py b/x2paddle/op_mapper/caffe_op_mapper.py
index e398f2b120d306733759d10eb0a90eb3da7c7e86..040df3e663b2a669127d396bbafba235630adf95 100644
--- a/x2paddle/op_mapper/caffe_op_mapper.py
+++ b/x2paddle/op_mapper/caffe_op_mapper.py
@@ -467,7 +467,7 @@ class CaffeOpMapper(OpMapper):
     def Concat(self, node):
         assert len(
             node.inputs
-        ) > 1, 'The count of Concat node\'s input is not more than 1.'
+        ) >= 1, 'The count of Concat node\'s input is not more than 1.'
         inputs = []
         for i in range(len(node.inputs)):
             input = self.graph.get_bottom_node(node, idx=i, copy=True)