diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 4be42d63d..b36635873 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -3644,8 +3644,7 @@ srs_error_t SrsConfig::check_normal_config()
         for (int i = 0; conf && i < (int)conf->directives.size(); i++) {
             string n = conf->at(i)->name;
             if (n != "enabled" && n != "listen" && n != "dir" && n != "candidate" && n != "ecdsa"
-                && n != "encrypt" && n != "reuseport" && n != "merge_nalus"
-                && n != "perf_stat" && n != "queue_length" && n != "black_hole"
+                && n != "encrypt" && n != "reuseport" && n != "merge_nalus" && n != "perf_stat" && n != "black_hole"
                 && n != "ip_family") {
                 return srs_error_new(ERROR_SYSTEM_CONFIG_INVALID, "illegal rtc_server.%s", n.c_str());
             }
@@ -4863,23 +4862,6 @@ bool SrsConfig::get_rtc_server_perf_stat()
     return SRS_CONF_PERFER_TRUE(conf->arg0());
 }
 
-int SrsConfig::get_rtc_server_queue_length()
-{
-    static int DEFAULT = 2000;
-
-    SrsConfDirective* conf = root->get("rtc_server");
-    if (!conf) {
-        return DEFAULT;
-    }
-
-    conf = conf->get("queue_length");
-    if (!conf || conf->arg0().empty()) {
-        return DEFAULT;
-    }
-
-    return ::atoi(conf->arg0().c_str());
-}
-
 bool SrsConfig::get_rtc_server_black_hole()
 {
     static bool DEFAULT = false;
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index 7995c50d1..4b480af8d 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -531,7 +531,6 @@ public:
     virtual int get_rtc_server_reuseport();
     virtual bool get_rtc_server_merge_nalus();
     virtual bool get_rtc_server_perf_stat();
-    virtual int get_rtc_server_queue_length();
     virtual bool get_rtc_server_black_hole();
     virtual std::string get_rtc_server_black_hole_publisher();
 private: