diff --git a/src/Rtsp/Rtsp.cpp b/src/Rtsp/Rtsp.cpp
index 0a7f4c35..7dc8456b 100644
--- a/src/Rtsp/Rtsp.cpp
+++ b/src/Rtsp/Rtsp.cpp
@@ -386,6 +386,9 @@ static void makeSockPair_l(std::pair<Socket::Ptr, Socket::Ptr> &pair, const stri
 }
 
 void makeSockPair(std::pair<Socket::Ptr, Socket::Ptr> &pair, const string &local_ip) {
+    //全局互斥锁保护，防止端口重复分配
+    static recursive_mutex s_mtx;
+    lock_guard<recursive_mutex> lck(s_mtx);
     int try_count = 0;
     while (true) {
         try {