diff --git a/deploy/cpp_infer/src/config.cpp b/deploy/cpp_infer/src/config.cpp
index 050b75ede9475432f250cafac2cd5fbed17fea0a..22e036532f724e64ac74b07401e766c06761f89b 100644
--- a/deploy/cpp_infer/src/config.cpp
+++ b/deploy/cpp_infer/src/config.cpp
@@ -23,16 +23,13 @@ std::vector<std::string> OCRConfig::split(const std::string &str,
     return res;
 
   int strlen = str.length() + 1;
-  chars *strs = new char[strlen];
+  char *strs = new char[strlen];
   std::strcpy(strs, str.c_str());
 
   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;
@@ -40,6 +37,9 @@ std::vector<std::string> OCRConfig::split(const std::string &str,
     p = std::strtok(NULL, d);
   }
 
+  delete[] strs;
+  delete[] d;
+
   return res;
 }