diff --git a/services/sim/src/operator_file_parser.cpp b/services/sim/src/operator_file_parser.cpp
index 72b48736ec8dceddfe74282730d8532e39c87977..8172c9534d8b7de67c2c46e64fee6bf0451f89cc 100644
--- a/services/sim/src/operator_file_parser.cpp
+++ b/services/sim/src/operator_file_parser.cpp
@@ -52,6 +52,8 @@ bool OperatorFileParser::WriteOperatorConfigJson(std::string filename, const cJS
     char *cjValue = cJSON_Print(root);
     if (cjValue == nullptr) {
         printf("ParseJsonFailed");
+        (void)fclose(file);
+        file = nullptr;
         return false;
     }
     int ret = fwrite(cjValue, sizeof(char), strlen(cjValue), file);