diff --git a/ShadowsocksX-NG.xcodeproj/project.pbxproj b/ShadowsocksX-NG.xcodeproj/project.pbxproj
index d3f372c..e93ba98 100755
--- a/ShadowsocksX-NG.xcodeproj/project.pbxproj
+++ b/ShadowsocksX-NG.xcodeproj/project.pbxproj
@@ -47,6 +47,8 @@
 		9B5832071E7421B2009D5B7D /* virtual-server-icon-3.png in Resources */ = {isa = PBXBuildFile; fileRef = 9B5832061E7421B2009D5B7D /* virtual-server-icon-3.png */; };
 		9B58320B1E7422DB009D5B7D /* http.png in Resources */ = {isa = PBXBuildFile; fileRef = 9B58320A1E7422DB009D5B7D /* http.png */; };
 		9B5AA0AC209C43C200E8B659 /* Credits.rtf in Resources */ = {isa = PBXBuildFile; fileRef = 9B5AA0AB209C43C200E8B659 /* Credits.rtf */; };
+		9B5D13292154A57C00F99F03 /* kcptun_client in Resources */ = {isa = PBXBuildFile; fileRef = 9B5D13282154A57C00F99F03 /* kcptun_client */; };
+		9B5D132A2154A62600F99F03 /* install_kcptun.sh in Resources */ = {isa = PBXBuildFile; fileRef = 9B5D13272154A50700F99F03 /* install_kcptun.sh */; };
 		9B6BF9541E27B2570061B9A7 /* ServiceManagement.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9B6BF9531E27B2570061B9A7 /* ServiceManagement.framework */; };
 		9B7297E7214D69C300FD24AA /* libmbedcrypto.2.12.0.dylib in Resources */ = {isa = PBXBuildFile; fileRef = 9B7297E5214D68F800FD24AA /* libmbedcrypto.2.12.0.dylib */; };
 		9B7297EA214D7C6B00FD24AA /* ShareServerProfilesWindowController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B7297E8214D7C6B00FD24AA /* ShareServerProfilesWindowController.swift */; };
@@ -199,6 +201,8 @@
 		9B5AA09F209C100C00E8B659 /* libsodium.23.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; path = libsodium.23.dylib; sourceTree = "<group>"; };
 		9B5AA0A2209C103900E8B659 /* libcares.2.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; path = libcares.2.dylib; sourceTree = "<group>"; };
 		9B5AA0AB209C43C200E8B659 /* Credits.rtf */ = {isa = PBXFileReference; lastKnownFileType = text.rtf; path = Credits.rtf; sourceTree = "<group>"; };
+		9B5D13272154A50700F99F03 /* install_kcptun.sh */ = {isa = PBXFileReference; lastKnownFileType = text.script.sh; path = install_kcptun.sh; sourceTree = "<group>"; };
+		9B5D13282154A57C00F99F03 /* kcptun_client */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.executable"; path = kcptun_client; sourceTree = "<group>"; };
 		9B6BF9531E27B2570061B9A7 /* ServiceManagement.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = ServiceManagement.framework; path = System/Library/Frameworks/ServiceManagement.framework; sourceTree = SDKROOT; };
 		9B7297E5214D68F800FD24AA /* libmbedcrypto.2.12.0.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; path = libmbedcrypto.2.12.0.dylib; sourceTree = "<group>"; };
 		9B7297E8214D7C6B00FD24AA /* ShareServerProfilesWindowController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ShareServerProfilesWindowController.swift; sourceTree = "<group>"; };
@@ -300,6 +304,7 @@
 		9B07EFB01D048E900052D9DF /* Support Files */ = {
 			isa = PBXGroup;
 			children = (
+				9B5D13252154A4B400F99F03 /* kcptun */,
 				9B5AA0A9209C41EC00E8B659 /* ss-local */,
 				1C82DBA31FA96C7400B32551 /* simple-obfs */,
 				9B16E5991F99FD0700E54DC5 /* icons8-Blind Filled-50.png */,
@@ -455,6 +460,15 @@
 			name = privoxy;
 			sourceTree = "<group>";
 		};
+		9B5D13252154A4B400F99F03 /* kcptun */ = {
+			isa = PBXGroup;
+			children = (
+				9B5D13282154A57C00F99F03 /* kcptun_client */,
+				9B5D13272154A50700F99F03 /* install_kcptun.sh */,
+			);
+			path = kcptun;
+			sourceTree = "<group>";
+		};
 		9B9F13A21E8A282C00DE4794 /* Products */ = {
 			isa = PBXGroup;
 			children = (
@@ -608,6 +622,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				9B5D132A2154A62600F99F03 /* install_kcptun.sh in Resources */,
 				9B7297E7214D69C300FD24AA /* libmbedcrypto.2.12.0.dylib in Resources */,
 				9BCB1D6C20A15B0E005BABE7 /* libsodium.23.dylib in Resources */,
 				9BCB1D6D20A15B0E005BABE7 /* libcares.2.dylib in Resources */,
@@ -638,6 +653,7 @@
 				9BAFE2E21E83ED7F00F71CCE /* PreferencesWinController.xib in Resources */,
 				9B0BFFEB1D0460A70040E62B /* Assets.xcassets in Resources */,
 				08FCA0FF1E24BE1A0070984F /* example-gui-config.json in Resources */,
+				9B5D13292154A57C00F99F03 /* kcptun_client in Resources */,
 				1C82DBA81FA96C7500B32551 /* obfs-local in Resources */,
 				9B938D9D1E864B38005F5636 /* menu_p_icon.png in Resources */,
 				9B938D9B1E864B38005F5636 /* menu_m_icon.png in Resources */,
diff --git a/ShadowsocksX-NG/AppDelegate.swift b/ShadowsocksX-NG/AppDelegate.swift
index a7e0cf7..b2222c6 100755
--- a/ShadowsocksX-NG/AppDelegate.swift
+++ b/ShadowsocksX-NG/AppDelegate.swift
@@ -83,6 +83,8 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserNotificationCenterDele
         InstallSSLocal()
         InstallPrivoxy()
         InstallSimpleObfs()
+        InstallKcptun()
+        
         // Prepare defaults
         let defaults = UserDefaults.standard
         defaults.register(defaults: [
diff --git a/ShadowsocksX-NG/LaunchAgentUtils.swift b/ShadowsocksX-NG/LaunchAgentUtils.swift
index 0ef1af9..9c0b258 100644
--- a/ShadowsocksX-NG/LaunchAgentUtils.swift
+++ b/ShadowsocksX-NG/LaunchAgentUtils.swift
@@ -210,6 +210,26 @@ func InstallSimpleObfs() {
     }
 }
 
+// --------------------------------------------------------------------------------
+//  MARK: kcptun
+
+func InstallKcptun() {
+    let fileMgr = FileManager.default
+    let homeDir = NSHomeDirectory()
+    let appSupportDir = homeDir+APP_SUPPORT_DIR
+    if !fileMgr.fileExists(atPath: appSupportDir + "kcptun_\(KCPTUN_CLIENT_VERSION)/kcptun_client") {
+        let bundle = Bundle.main
+        let installerPath = bundle.path(forResource: "install_kcptun", ofType: "sh")
+        let task = Process.launchedProcess(launchPath: "/bin/sh", arguments: [installerPath!])
+        task.waitUntilExit()
+        if task.terminationStatus == 0 {
+            NSLog("Install kcptun succeeded.")
+        } else {
+            NSLog("Install kcptun failed.")
+        }
+    }
+}
+
 // --------------------------------------------------------------------------------
 //  MARK: privoxy
 
diff --git a/ShadowsocksX-NG/kcptun/install_kcptun.sh b/ShadowsocksX-NG/kcptun/install_kcptun.sh
new file mode 100644
index 0000000..5f43fa5
--- /dev/null
+++ b/ShadowsocksX-NG/kcptun/install_kcptun.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+#  install_kcptun.sh
+#  ShadowsocksX-NG
+#
+#  Created by 邱宇舟 on 2018/9/21.
+#  Copyright © 2018年 qiuyuzhou. All rights reserved.
+
+# https://github.com/shadowsocks/kcptun/releases
+
+VERSION="v20170718"
+
+cd `dirname "${BASH_SOURCE[0]}"`
+
+mkdir -p "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_$VERSION"
+cp -f kcptun_client "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_$VERSION/"
+
+ln -sfh "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_$VERSION/kcptun_client" "$HOME/Library/Application Support/ShadowsocksX-NG/plugins/kcptun"
+
+echo "install kcptun done"
diff --git a/ShadowsocksX-NG/kcptun/kcptun_client b/ShadowsocksX-NG/kcptun/kcptun_client
new file mode 100755
index 0000000..ccb973e
Binary files /dev/null and b/ShadowsocksX-NG/kcptun/kcptun_client differ