diff --git a/backend/sub-store.js b/backend/sub-store.js
index f952418..1d2033d 100644
--- a/backend/sub-store.js
+++ b/backend/sub-store.js
@@ -773,10 +773,10 @@ function service() {
     }
 
     async function refreshCache(req, res) {
-        const {url} = req.body;
+        const { url, ua } = req.body;
         $.info(`Refreshing cache for URL: ${url}`);
         try {
-            const raw = await getResource(url, false);
+            const raw = await getResource(url, false, ua);
             $.write(raw, `#${Base64.safeEncode(url)}`);
             res.json({
                 status: "success",
@@ -871,11 +871,16 @@ function service() {
     }
 
     // get resource, with cache ability to speedup response time
-    async function getResource(url, useCache = true) {
-        // use QX agent to get flow headers
+    async function getResource(url, useCache = true, userAgent) {
+        // use QX agent to get flow headers ,if not assign user-agent
+        let ua = userAgent
+        if (typeof userAgent == "undefined" || userAgent == null || userAgent.trim().length == 0) {
+            ua = "Quantumult%20X"
+        }
+        
         const $http = HTTP({
             headers: {
-                "User-Agent": "Quantumult%20X",
+                "User-Agent": ua,
             },
         });
         const key = "#" + Base64.safeEncode(url);
@@ -915,7 +920,7 @@ function service() {
     ) {
         if (type === "subscription") {
             const sub = item;
-            const raw = await getResource(sub.url, useCache);
+            const raw = await getResource(sub.url, useCache, sub.ua);
             // parse proxies
             let proxies = ProxyUtils.parse(raw);
             if (!noProcessor) {
@@ -945,7 +950,7 @@ function service() {
                     }% `
                 );
                 try {
-                    const raw = await getResource(sub.url, useCache);
+                    const raw = await getResource(sub.url, useCache, sub.ua);
                     // parse proxies
                     let currentProxies = ProxyUtils.parse(raw);
                     if (!noProcessor) {
@@ -1379,13 +1384,13 @@ var ProxyUtils = (function () {
                 let paramArr = line.split("?")
                 let sni=null
                 if (paramArr.length > 1) {
-                    paramArr=paramArr[1].split("#")[0].split("&")
+                    paramArr = paramArr[1].split("#")[0].split("&")
                     const params = new Map(paramArr.map((item) => {
                         return item.split("=")
                     }))
                     sni = params.get("sni")
                 }
-                
+
                 return {
                     name: name || `[Trojan] ${server}`, // trojan uri may have no server tag!
                     type: "trojan",
diff --git a/web/src/views/SubEditor.vue b/web/src/views/SubEditor.vue
index 3c96333..d43f6c1 100644
--- a/web/src/views/SubEditor.vue
+++ b/web/src/views/SubEditor.vue
@@ -49,6 +49,16 @@
             />
           </v-list-item>
         </v-list>
+        <v-textarea
+            v-model="options.ua"
+            auto-grow
+            class="mt-2"
+            clear-icon="clear"
+            clearable
+            label="User-Agent"
+            placeholder="自定义下载订阅使用的User-Agent，可选。"
+            rows="2"
+        />
         <v-textarea
             v-model="options.icon"
             auto-grow
@@ -354,6 +364,7 @@ export default {
         name: "",
         url: "",
         icon: "",
+        ua: "",
         useless: "KEEP",
         udp: "DEFAULT",
         "skip-cert-verify": "DEFAULT",
@@ -413,6 +424,13 @@ export default {
       } else {
         output.url = this.options.url;
       }
+      // assign user-agent, if ua is set
+      let ua = this.options.ua;
+      if (typeof ua != "undefined" && ua != null && ua.trim().length > 0) {
+        output.ua = ua;
+      }else{
+        output.ua=""
+      }
       // useless filter
       if (this.options.useless === 'REMOVE') {
         output.process.push({
@@ -573,6 +591,7 @@ function loadProcess(options, source, isCollection = false) {
     ...options,
     name: source.name,
     icon: source.icon,
+    ua: source.ua
   };
   if (isCollection) {
     options.subscriptions = source.subscriptions;