diff --git a/src/autonomy/route/src/route_node.cpp b/src/autonomy/route/src/route_node.cpp
index 3c2e181..d5f33ed 100644
--- a/src/autonomy/route/src/route_node.cpp
+++ b/src/autonomy/route/src/route_node.cpp
@@ -60,11 +60,14 @@ bool upload_file(string filename)
     curl = curl_easy_init();
     struct curl_httppost* post = NULL;
     struct curl_httppost* last = NULL;
+
+    // 只计算一次MD5值
+    string md5_value = calculate_md5(filename);
+
     curl_formadd(&post, &last, CURLFORM_PTRNAME, "vid", CURLFORM_PTRCONTENTS, vid.c_str(),
                  CURLFORM_END);  // form-data key(path) 和 value(device_cover)
     curl_formadd(&post, &last, CURLFORM_COPYNAME, "file", CURLFORM_FILE, filename.c_str(), CURLFORM_END);
-    curl_formadd(&post, &last, CURLFORM_COPYNAME, "md5", CURLFORM_COPYCONTENTS, calculate_md5(filename).c_str(),
-                 CURLFORM_END);
+    curl_formadd(&post, &last, CURLFORM_COPYNAME, "md5", CURLFORM_COPYCONTENTS, md5_value.c_str(), CURLFORM_END);
     curl_easy_setopt(curl, CURLOPT_URL, upload_URL.c_str());
     curl_easy_setopt(curl, CURLOPT_HTTPPOST, post);
     ret = curl_easy_perform(curl);