diff --git a/ge/graph/preprocess/graph_preprocess.cc b/ge/graph/preprocess/graph_preprocess.cc
index f0a8c1f3..19f5ef54 100644
--- a/ge/graph/preprocess/graph_preprocess.cc
+++ b/ge/graph/preprocess/graph_preprocess.cc
@@ -959,7 +959,7 @@ Status ParseDynamicInputShapeRange(const std::string &shape_range,
         // fix dim
         auto range_value = StringToLongNoThrow(range_pair_set.at(0).c_str());
         if (range_value < 0) {
-          range_pair = std::make_pair(0, range_value);
+          range_pair = std::make_pair(1, range_value);
         } else {
           range_pair = std::make_pair(range_value, range_value);
         }