diff --git a/deploy/cpp_infer/src/config.cpp b/deploy/cpp_infer/src/config.cpp
index 303c3c1259515ee8c67fa865bf485ae3338505d6..050b75ede9475432f250cafac2cd5fbed17fea0a 100644
--- a/deploy/cpp_infer/src/config.cpp
+++ b/deploy/cpp_infer/src/config.cpp
@@ -21,12 +21,18 @@ std::vector<std::string> OCRConfig::split(const std::string &str,
   std::vector<std::string> res;
   if ("" == str)
     return res;
-  char *strs = new char[str.length() + 1];
+
+  int strlen = str.length() + 1;
+  chars *strs = new char[strlen];
   std::strcpy(strs, str.c_str());
 
-  char *d = new char[delim.length() + 1];
+  int delimlen = delim.length() + 1;
+  char *d = new char[delimlen];
   std::strcpy(d, delim.c_str());
 
+  delete[] strs;
+  delete[] d;
+
   char *p = std::strtok(strs, d);
   while (p) {
     std::string s = p;
@@ -61,4 +67,4 @@ void OCRConfig::PrintConfigInfo() {
   std::cout << "=======End of Paddle OCR inference config======" << std::endl;
 }
 
-} // namespace PaddleOCR
\ No newline at end of file
+} // namespace PaddleOCR