diff --git a/mindspore/ccsrc/minddata/dataset/vision/kernels/dvpp/utils/AclLiteUtils.cc b/mindspore/ccsrc/minddata/dataset/vision/kernels/dvpp/utils/AclLiteUtils.cc
index c6a18e6cd0534c5459d7592531fe603791c26249..1ebd329445d83d979b6646b4daab04a291b32ad7 100644
--- a/mindspore/ccsrc/minddata/dataset/vision/kernels/dvpp/utils/AclLiteUtils.cc
+++ b/mindspore/ccsrc/minddata/dataset/vision/kernels/dvpp/utils/AclLiteUtils.cc
@@ -483,7 +483,7 @@ bool AnalyseLine(const std::string &line, std::string &key, std::string &value)
     }
     end_pos = pos - 1;
   }
-  std::string new_line = line.substr(start_pos, start_pos + 1 - end_pos);  // delete comment
+  std::string new_line = line.substr(start_pos, end_pos - start_pos + 1);  // delete comment
   pos = new_line.find(EQUALS_CHAR);
   if (pos == std::string::npos) {  // has no =
     return false;