diff --git a/script/buct-cource-copy.js b/script/buct-cource-copy.js
index 0d6c018..2dc6975 100644
--- a/script/buct-cource-copy.js
+++ b/script/buct-cource-copy.js
@@ -19,29 +19,40 @@
         id: ""
     };
 
-    async function poll() {
-        let res;
-        try {
-            res = await fetch(`${HOST}/polling?env=course`, {
-                method: "GET",
-                headers: {
-                    "Content-Type": "application/json"
-                }
-            });
-        } catch {
-            await new Promise((resolve) => setTimeout(resolve, 1000));
-            return poll();
+    class Poll {
+        polling = true;
+
+        constructor() {
+            this.poll();
         }
-        poll();
-        try {
-            const data = await res.json();
-            if (data.status !== "nothing") {
-                const { questionID, answer } = data.data;
-                console.log("回答", questionID, "\n", answer);
-                answerQuestion(questionID, answer);
+
+        async poll() {
+            if (!this.polling) {
+                return;
+            }
+            let res;
+            try {
+                res = await fetch(`${HOST}/polling?env=course`, {
+                    method: "GET",
+                    headers: {
+                        "Content-Type": "application/json"
+                    }
+                });
+            } catch {
+                await new Promise((resolve) => setTimeout(resolve, 1000));
+                return poll();
+            }
+            poll();
+            try {
+                const data = await res.json();
+                if (data.status !== "nothing") {
+                    const { questionID, answer } = data.data;
+                    console.log("回答", questionID, "\n", answer);
+                    answerQuestion(questionID, answer);
+                }
+            } catch (e) {
+                console.error(e);
             }
-        } catch (e) {
-            console.error(e);
         }
     }
 
@@ -71,7 +82,7 @@
         if (id !== question.id) {
             return;
         }
-        aiButton.value = "？"
+        aiButton.value = "？";
         const answers = answer.split("\n");
         const children = getAnswerElement().children[0].children;
         for (const child of children) {
@@ -108,6 +119,7 @@
     };
 
     let aiButton;
+    let poll;
 
     function createButton(addAiButton = false) {
         const base = document.getElementById("mainFrame");
@@ -140,9 +152,19 @@
 
     function initAiBridge() {
         createButton(true);
-        poll();
+        if (poll) {
+            poll.polling = false;
+        }
+        poll = new Poll();
+    }
+
+    function stopPolling() {
+        if (poll) {
+            poll.polling = false;
+        }
     }
 
     GM_registerMenuCommand("添加复制按钮", createButton);
     GM_registerMenuCommand("初始化ai桥", initAiBridge);
+    GM_registerMenuCommand("停止轮询", stopPolling);
 })();