diff --git a/app/src/main/java/io/nekohasekai/sagernet/Constants.kt b/app/src/main/java/io/nekohasekai/sagernet/Constants.kt
index 992f817..47bd5d3 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/Constants.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/Constants.kt
@@ -58,6 +58,7 @@ object Key {
     const val ALWAYS_SHOW_ADDRESS = "alwaysShowAddress"
 
     // Protocol Settings
+    const val MUX_TYPE = "muxType"
     const val MUX_PROTOCOLS = "mux"
     const val MUX_CONCURRENCY = "muxConcurrency"
 
diff --git a/app/src/main/java/io/nekohasekai/sagernet/database/DataStore.kt b/app/src/main/java/io/nekohasekai/sagernet/database/DataStore.kt
index db248f4..2c043d8 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/database/DataStore.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/database/DataStore.kt
@@ -167,6 +167,7 @@ object DataStore : OnPreferenceDataStoreChangeListener {
 
     // protocol
 
+    var muxType by configurationStore.stringToInt(Key.MUX_TYPE)
     var muxProtocols by configurationStore.stringSet(Key.MUX_PROTOCOLS)
     var muxConcurrency by configurationStore.stringToInt(Key.MUX_CONCURRENCY) { 8 }
 
diff --git a/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt b/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt
index b7896f2..6935155 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/fmt/ConfigBuilder.kt
@@ -424,6 +424,11 @@ fun buildConfig(
                             currentOutbound["multiplex"] = MultiplexOptions().apply {
                                 enabled = true
                                 max_streams = DataStore.muxConcurrency
+                                protocol = when (DataStore.muxType) {
+                                    1 -> "smux"
+                                    2 -> "yamux"
+                                    else -> "h2mux"
+                                }
                             }
                         }
                     }
diff --git a/app/src/main/java/moe/matsuri/nb4a/Protocols.kt b/app/src/main/java/moe/matsuri/nb4a/Protocols.kt
index ca0b4d7..8343a3a 100644
--- a/app/src/main/java/moe/matsuri/nb4a/Protocols.kt
+++ b/app/src/main/java/moe/matsuri/nb4a/Protocols.kt
@@ -29,8 +29,7 @@ object Protocols {
 
     fun getCanMuxList(): List<String> {
         // built-in and support mux
-        // TODO support vless mux in sing-box 1.3.x
-        val list = mutableListOf("vmess", "trojan", "trojan-go", "shadowsocks")
+        val list = mutableListOf("vmess", "trojan", "trojan-go", "shadowsocks", "vless")
 
         NekoPluginManager.getProtocols().forEach {
             if (it.protocolConfig.optBoolean("canMux")) {
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 5ba3efe..6dbc71b 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -474,4 +474,5 @@
     <string name="mtu_help">长按设置项以设置自定义 MTU。</string>
     <string name="log_level_help">长按设置项以设置缓冲区大小。</string>
     <string name="test_concurrency">测试并发</string>
+    <string name="mux_type">Mux 协议</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/arrays.xml b/app/src/main/res/values/arrays.xml
index 1b9111d..6d672d2 100644
--- a/app/src/main/res/values/arrays.xml
+++ b/app/src/main/res/values/arrays.xml
@@ -433,6 +433,12 @@
 
     <string-array name="mux_select_init" />
 
+    <string-array name="mux_type">
+        <item>h2mux</item>
+        <item>smux</item>
+        <item>yamux</item>
+    </string-array>
+
     <string-array name="dns_network_select">
         <item>NoRemoteIPv4</item>
         <item>NoRemoteIPv6</item>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 3cf2cc1..b20b034 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -515,5 +515,6 @@ Anyone can write advanced plugins, which can control NekoBox. please download an
     <string name="log_level_help">Long press the preference to set the buffer size.</string>
     <string name="tls_camouflage_settings">TLS Camouflage Settings</string>
     <string name="test_concurrency">Test concurrency</string>
+    <string name="mux_type">Mux protocol</string>
 
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/xml/global_preferences.xml b/app/src/main/res/xml/global_preferences.xml
index 9c3578f..afebcbc 100644
--- a/app/src/main/res/xml/global_preferences.xml
+++ b/app/src/main/res/xml/global_preferences.xml
@@ -140,6 +140,13 @@
             app:key="mux"
             app:summary="@string/mux_sum"
             app:title="@string/enable_mux" />
+        <moe.matsuri.nb4a.ui.SimpleMenuPreference
+            app:defaultValue="0"
+            app:entries="@array/mux_type"
+            app:entryValues="@array/int_array_3"
+            app:key="muxType"
+            app:title="@string/mux_type"
+            app:useSimpleSummaryProvider="true" />
         <EditTextPreference
             app:defaultValue="8"
             app:icon="@drawable/ic_baseline_low_priority_24"