diff --git a/apps/web/src/components/voice/CloneModal.tsx b/apps/web/src/components/voice/CloneModal.tsx
index 1107862e8..29d4d0b81 100644
--- a/apps/web/src/components/voice/CloneModal.tsx
+++ b/apps/web/src/components/voice/CloneModal.tsx
@@ -44,15 +44,8 @@ const ACCEPTED_EXTENSIONS = ["mp3", "wav", "m4a"];
 const ACCEPTED_MIME = ".mp3,.wav,.m4a,audio/mpeg,audio/wav,audio/mp4";
 const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10MB
 
-/* ── 默认音色名称计数器 ─────────────────────────────────── */
-
-let cloneCounter = 1;
-
-const getNextDefaultName = (): string => {
-  const name = `我的声音 ${cloneCounter}`;
-  cloneCounter += 1;
-  return name;
-};
+/** 最长录制时长：5 分钟（秒） */
+const MAX_RECORD_SECONDS = 5 * 60;
 
 /* ── 组件 ───────────────────────────────────────────────── */
 
@@ -78,6 +71,15 @@ const CloneModal: React.FC<CloneModalProps> = ({
   const recordTimerRef = useRef<ReturnType<typeof setInterval> | null>(null);
   const mediaRecorderRef = useRef<MediaRecorder | null>(null);
   const audioChunksRef = useRef<Blob[]>([]);
+  /** 默认音色名称计数器（组件级 ref，避免多实例串号） */
+  const cloneCounterRef = useRef(1);
+
+  /** 生成下一个默认音色名称 */
+  const getNextDefaultName = useCallback((): string => {
+    const name = `我的声音 ${cloneCounterRef.current}`;
+    cloneCounterRef.current += 1;
+    return name;
+  }, []);
 
   /** 组件卸载时清理定时器和 MediaRecorder */
   useEffect(() => {
@@ -110,7 +112,7 @@ const CloneModal: React.FC<CloneModalProps> = ({
       mediaRecorderRef.current.stop();
     }
     mediaRecorderRef.current = null;
-  }, []);
+  }, [getNextDefaultName]);
 
   /** 关闭弹窗 */
   const handleClose = useCallback(() => {
@@ -238,7 +240,25 @@ const CloneModal: React.FC<CloneModalProps> = ({
         setErrorMessage("");
 
         recordTimerRef.current = setInterval(() => {
-          setRecordTime((prev) => prev + 1);
+          setRecordTime((prev) => {
+            const next = prev + 1;
+            if (next >= MAX_RECORD_SECONDS) {
+              // 达到 5 分钟上限，自动停止录制
+              setTimeout(() => {
+                setIsRecording(false);
+                if (recordTimerRef.current) {
+                  clearInterval(recordTimerRef.current);
+                  recordTimerRef.current = null;
+                }
+                if (mediaRecorderRef.current && mediaRecorderRef.current.state !== "inactive") {
+                  mediaRecorderRef.current.stop();
+                }
+                setErrorMessage("已达最长录制时长（5分钟），已自动停止");
+              }, 0);
+              return MAX_RECORD_SECONDS;
+            }
+            return next;
+          });
         }, 1000);
       } catch {
         setErrorMessage("无法访问麦克风，请检查浏览器权限设置");
@@ -446,7 +466,7 @@ const CloneModal: React.FC<CloneModalProps> = ({
                     ? `录制中 ${formatRecordTime(recordTime)}`
                     : recordedBlob
                       ? `已录制 ${formatRecordTime(recordTime)}`
-                      : "点击按钮开始录制你的声音"}
+                      : "点击按钮开始录制（最长 5 分钟）"}
                 </p>
                 {isRecording && (
                   <div className="xx-clonemodal-record-wave">