diff --git a/backend/app/routes/admin.py b/backend/app/routes/admin.py
index 7afdbef..3c57cdd 100644
--- a/backend/app/routes/admin.py
+++ b/backend/app/routes/admin.py
@@ -13,6 +13,7 @@ from app.schemas import (
 )
 from app.auth import get_current_user
 from app.services.cleanup import get_setting, set_setting, disk_stats, run_cleanup
+from app.services.downloader import get_progress
 
 router = APIRouter(prefix="/api/admin", tags=["admin"])
 
@@ -48,12 +49,13 @@ async def list_videos(
     total = (await db.execute(count_query)).scalar() or 0
     videos = (await db.execute(query.offset((page - 1) * page_size).limit(page_size))).scalars().all()
 
-    return VideoListResponse(
-        videos=[VideoInfo.model_validate(v) for v in videos],
-        total=total,
-        page=page,
-        page_size=page_size,
-    )
+    items = []
+    for v in videos:
+        info = VideoInfo.model_validate(v)
+        if v.status == "downloading":
+            info.progress = get_progress(v.task_id)
+        items.append(info)
+    return VideoListResponse(videos=items, total=total, page=page, page_size=page_size)
 
 
 @router.delete("/videos/{video_id}")
diff --git a/backend/app/routes/download.py b/backend/app/routes/download.py
index b375ff6..ca53d9a 100644
--- a/backend/app/routes/download.py
+++ b/backend/app/routes/download.py
@@ -12,7 +12,10 @@ from app.schemas import DownloadRequest, DownloadResponse, TaskStatus
 from app.database import get_db, async_session
 from app.models import Video, DownloadLog
 from app.auth import get_current_user, optional_auth
-from app.services.downloader import download_video, get_video_path, detect_platform
+from app.services.downloader import (
+    download_video, get_video_path, detect_platform,
+    register_task, get_progress, request_cancel, cleanup_task,
+)
 
 logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/api", tags=["download"])
@@ -107,7 +110,7 @@ async def _log_download(video_id: int, request: Request):
 
 
 async def _do_download(task_id: str, url: str, format_id: str):
-    """Background download task."""
+    """Background download task with real-time progress and cancel support."""
     from app.database import async_session
     async with async_session() as db:
         video = (await db.execute(select(Video).where(Video.task_id == task_id))).scalar_one_or_none()
@@ -117,10 +120,9 @@ async def _do_download(task_id: str, url: str, format_id: str):
             video.status = "downloading"
             await db.commit()
 
-            def update_progress(pct):
-                pass  # Progress tracking in sync context is complex; keep simple
+            register_task(task_id)
+            result = download_video(url, format_id, task_id=task_id)
 
-            result = download_video(url, format_id, progress_callback=update_progress)
             video.title = result["title"]
             video.thumbnail = result["thumbnail"]
             video.duration = result["duration"]
@@ -133,9 +135,13 @@ async def _do_download(task_id: str, url: str, format_id: str):
             await db.commit()
         except Exception as e:
             logger.error(f"Download failed for {task_id}: {e}")
+            is_cancel = "Cancelled" in str(e) or "DownloadCancelled" in type(e).__name__
             video.status = "error"
-            video.error_message = str(e)[:500]
+            video.error_message = "下载已取消，请重试" if is_cancel else str(e)[:500]
+            video.progress = 0
             await db.commit()
+        finally:
+            cleanup_task(task_id)
 
 
 @router.post("/download", response_model=DownloadResponse)
@@ -167,16 +173,29 @@ async def get_download_status(task_id: str, db: AsyncSession = Depends(get_db)):
     video = (await db.execute(select(Video).where(Video.task_id == task_id))).scalar_one_or_none()
     if not video:
         raise HTTPException(status_code=404, detail="Task not found")
+    # Inject real-time progress for active downloads
+    progress = get_progress(task_id) if video.status == "downloading" else video.progress
     return TaskStatus(
         task_id=video.task_id,
         status=video.status,
-        progress=video.progress,
+        progress=progress,
         title=video.title,
         error_message=video.error_message or "",
         video_id=video.id if video.status == "done" else None,
     )
 
 
+@router.post("/download/{task_id}/cancel")
+async def cancel_download(task_id: str, db: AsyncSession = Depends(get_db)):
+    video = (await db.execute(select(Video).where(Video.task_id == task_id))).scalar_one_or_none()
+    if not video:
+        raise HTTPException(status_code=404, detail="Task not found")
+    if video.status != "downloading":
+        raise HTTPException(status_code=400, detail="Task is not downloading")
+    request_cancel(task_id)
+    return {"ok": True, "message": "Cancel requested"}
+
+
 @router.get("/file/{video_id}")
 async def download_file(video_id: int, request: Request, background_tasks: BackgroundTasks, user: dict = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
     video = (await db.execute(select(Video).where(Video.id == video_id))).scalar_one_or_none()
diff --git a/backend/app/schemas.py b/backend/app/schemas.py
index 5d616b3..2f9f1f4 100644
--- a/backend/app/schemas.py
+++ b/backend/app/schemas.py
@@ -57,6 +57,7 @@ class VideoInfo(BaseModel):
     file_size: int
     duration: int
     status: str
+    progress: int = 0
     error_message: str = ""
     created_at: datetime
 
diff --git a/backend/app/services/downloader.py b/backend/app/services/downloader.py
index 1b10195..2186a4e 100644
--- a/backend/app/services/downloader.py
+++ b/backend/app/services/downloader.py
@@ -5,6 +5,7 @@ import uuid
 import json
 import asyncio
 import logging
+import threading
 import urllib.request
 from pathlib import Path
 from typing import Optional
@@ -12,6 +13,45 @@ import yt_dlp
 
 logger = logging.getLogger(__name__)
 
+# ── In-memory progress / cancel store (thread-safe via GIL) ─────────────────
+_download_progress: dict[str, int] = {}    # task_id → 0-100
+_cancel_flags: dict[str, threading.Event] = {}  # task_id → Event
+
+
+def register_task(task_id: str):
+    _cancel_flags[task_id] = threading.Event()
+    _download_progress[task_id] = 0
+
+
+def get_progress(task_id: str) -> int:
+    return _download_progress.get(task_id, 0)
+
+
+def request_cancel(task_id: str):
+    flag = _cancel_flags.get(task_id)
+    if flag:
+        flag.set()
+
+
+def cleanup_task(task_id: str):
+    _cancel_flags.pop(task_id, None)
+    _download_progress.pop(task_id, None)
+
+
+def _make_hook(task_id: str):
+    """yt-dlp progress hook with real-time tracking and cancel support."""
+    def hook(d):
+        flag = _cancel_flags.get(task_id)
+        if flag and flag.is_set():
+            raise yt_dlp.utils.DownloadCancelled("Cancelled by user")
+        if d["status"] == "downloading":
+            total = d.get("total_bytes") or d.get("total_bytes_estimate") or 0
+            done = d.get("downloaded_bytes", 0)
+            _download_progress[task_id] = int(done * 100 / total) if total else 0
+        elif d["status"] == "finished":
+            _download_progress[task_id] = 99  # merging, not 100 yet
+    return hook
+
 VIDEO_BASE_PATH = os.getenv("VIDEO_BASE_PATH", "/home/xdl/xdl_videos")
 X_VIDEOS_PATH = os.path.join(VIDEO_BASE_PATH, "x_videos")
 YOUTUBE_VIDEOS_PATH = os.path.join(VIDEO_BASE_PATH, "youtube_videos")
@@ -149,7 +189,7 @@ def _parse_twitter_video(url: str) -> dict:
     }
 
 
-def _download_twitter_video(url: str, format_id: str = "best", progress_callback=None) -> dict:
+def _download_twitter_video(url: str, format_id: str = "best", progress_callback=None, task_id: str = None) -> dict:
     """Download Twitter video using syndication API."""
     tweet_id = _extract_tweet_id(url)
     if not tweet_id:
@@ -198,14 +238,22 @@ def _download_twitter_video(url: str, format_id: str = "best", progress_callback
 
     with open(filename, 'wb') as f:
         while True:
+            # Check cancel flag
+            if task_id and _cancel_flags.get(task_id, threading.Event()).is_set():
+                raise yt_dlp.utils.DownloadCancelled("Cancelled by user")
             chunk = resp.read(65536)
             if not chunk:
                 break
             f.write(chunk)
             downloaded += len(chunk)
+            pct = int(downloaded * 100 / total) if total > 0 else 0
+            if task_id:
+                _download_progress[task_id] = pct
             if progress_callback and total > 0:
-                progress_callback(int(downloaded * 100 / total))
+                progress_callback(pct)
 
+    if task_id:
+        _download_progress[task_id] = 99
     if progress_callback:
         progress_callback(100)
 
@@ -276,7 +324,7 @@ def _parse_youtube_video(url: str) -> dict:
     }
 
 
-def _download_youtube_video(url: str, format_id: str = "best", progress_callback=None) -> dict:
+def _download_youtube_video(url: str, format_id: str = "best", progress_callback=None, task_id: str = None) -> dict:
     """Download YouTube video using yt-dlp."""
     task_id = str(uuid.uuid4())[:8]
     output_template = os.path.join(YOUTUBE_VIDEOS_PATH, f"%(id)s_{task_id}.%(ext)s")
@@ -286,14 +334,7 @@ def _download_youtube_video(url: str, format_id: str = "best", progress_callback
     else:
         format_spec = f"{format_id}+bestaudio/best"
 
-    def hook(d):
-        if d["status"] == "downloading" and progress_callback:
-            total = d.get("total_bytes") or d.get("total_bytes_estimate") or 0
-            downloaded = d.get("downloaded_bytes", 0)
-            pct = int(downloaded * 100 / total) if total > 0 else 0
-            progress_callback(pct)
-        elif d["status"] == "finished" and progress_callback:
-            progress_callback(100)
+    hooks = [_make_hook(task_id)] if task_id else []
 
     ydl_opts = {
         "format": format_spec,
@@ -301,7 +342,7 @@ def _download_youtube_video(url: str, format_id: str = "best", progress_callback
         "merge_output_format": "mp4",
         "quiet": True,
         "no_warnings": True,
-        "progress_hooks": [hook],
+        "progress_hooks": hooks,
     }
 
     with yt_dlp.YoutubeDL(ydl_opts) as ydl:
@@ -384,7 +425,7 @@ def _parse_pornhub_video(url: str) -> dict:
     }
 
 
-def _download_pornhub_video(url: str, format_id: str = "best", progress_callback=None) -> dict:
+def _download_pornhub_video(url: str, format_id: str = "best", progress_callback=None, task_id: str = None) -> dict:
     """Download Pornhub video using yt-dlp."""
     task_id = str(uuid.uuid4())[:8]
     output_template = os.path.join(PH_VIDEOS_PATH, f"%(id)s_{task_id}.%(ext)s")
@@ -396,14 +437,7 @@ def _download_pornhub_video(url: str, format_id: str = "best", progress_callback
         # The format may already contain audio (merged); try with audio fallback gracefully
         format_spec = f"{format_id}+bestaudio/{format_id}/best"
 
-    def hook(d):
-        if d["status"] == "downloading" and progress_callback:
-            total = d.get("total_bytes") or d.get("total_bytes_estimate") or 0
-            downloaded = d.get("downloaded_bytes", 0)
-            pct = int(downloaded * 100 / total) if total > 0 else 0
-            progress_callback(pct)
-        elif d["status"] == "finished" and progress_callback:
-            progress_callback(100)
+    hooks = [_make_hook(task_id)] if task_id else []
 
     ydl_opts = {
         "format": format_spec,
@@ -412,7 +446,7 @@ def _download_pornhub_video(url: str, format_id: str = "best", progress_callback
         "quiet": True,
         "no_warnings": True,
         "http_headers": _PH_HEADERS,
-        "progress_hooks": [hook],
+        "progress_hooks": hooks,
     }
 
     with yt_dlp.YoutubeDL(ydl_opts) as ydl:
@@ -507,39 +541,32 @@ def parse_video_url(url: str) -> dict:
     }
 
 
-def download_video(url: str, format_id: str = "best", progress_callback=None) -> dict:
+def download_video(url: str, format_id: str = "best", progress_callback=None, task_id: str = None) -> dict:
     """Download video and return file info."""
     # Use syndication API for Twitter/X URLs
     if _is_twitter_url(url):
         logger.info(f"Using Twitter syndication API for download: {url}")
         try:
-            return _download_twitter_video(url, format_id, progress_callback)
+            return _download_twitter_video(url, format_id, progress_callback, task_id=task_id)
         except Exception as e:
             logger.warning(f"Twitter syndication download failed, falling back to yt-dlp: {e}")
 
     # YouTube URLs
     if _is_youtube_url(url):
         logger.info(f"Downloading YouTube video: {url}")
-        return _download_youtube_video(url, format_id, progress_callback)
+        return _download_youtube_video(url, format_id, progress_callback, task_id=task_id)
 
     # Pornhub URLs
     if _is_pornhub_url(url):
         logger.info(f"Downloading Pornhub video: {url}")
-        return _download_pornhub_video(url, format_id, progress_callback)
+        return _download_pornhub_video(url, format_id, progress_callback, task_id=task_id)
 
     task_id = str(uuid.uuid4())[:8]
     output_template = os.path.join(X_VIDEOS_PATH, f"%(id)s_{task_id}.%(ext)s")
 
     format_spec = "bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best" if format_id == "best" else f"{format_id}+bestaudio/best"
 
-    def hook(d):
-        if d["status"] == "downloading" and progress_callback:
-            total = d.get("total_bytes") or d.get("total_bytes_estimate") or 0
-            downloaded = d.get("downloaded_bytes", 0)
-            pct = int(downloaded * 100 / total) if total > 0 else 0
-            progress_callback(pct)
-        elif d["status"] == "finished" and progress_callback:
-            progress_callback(100)
+    hooks = [_make_hook(task_id)] if task_id else []
 
     ydl_opts = {
         "format": format_spec,
@@ -547,7 +574,7 @@ def download_video(url: str, format_id: str = "best", progress_callback=None) ->
         "merge_output_format": "mp4",
         "quiet": True,
         "no_warnings": True,
-        "progress_hooks": [hook],
+        "progress_hooks": hooks,
     }
 
     with yt_dlp.YoutubeDL(ydl_opts) as ydl:
diff --git a/frontend/src/views/Admin.vue b/frontend/src/views/Admin.vue
index e9a2ae6..df5b863 100644
--- a/frontend/src/views/Admin.vue
+++ b/frontend/src/views/Admin.vue
@@ -44,6 +44,13 @@
                 <span v-if="v.file_size">{{ humanSize(v.file_size) }}</span>
                 <span>{{ fmtTime(v.created_at) }}</span>
               </div>
+              <!-- Progress bar for downloading -->
+              <div v-if="v.status === 'downloading'" class="progress-wrap">
+                <div class="progress-bar">
+                  <div class="progress-fill" :style="{ width: v.progress + '%' }"></div>
+                </div>
+                <span class="progress-pct">{{ v.progress }}%</span>
+              </div>
               <!-- Error message -->
               <div v-if="v.status === 'error' && v.error_message" class="error-msg" :title="v.error_message">
                 ⚠️ {{ v.error_message }}
@@ -53,11 +60,12 @@
             </div>
           </div>
           <div class="actions">
+            <button v-if="v.status === 'downloading'" @click="cancelDownload(v)" class="btn-cancel" title="Cancel download">✕ Cancel</button>
             <button v-if="v.status === 'done'" @click="showLogs(v)" class="btn-log" title="Download logs">📋</button>
             <button v-if="v.status === 'done'" @click="playVideo(v)" class="btn-play">▶ Play</button>
             <a v-if="v.status === 'done'" :href="'/api/file/' + v.id" class="btn-dl"
                :download="v.filename" @click.prevent="downloadAuth(v)">💾</a>
-            <button @click="deleteVideo(v)" class="btn-del">🗑</button>
+            <button v-if="v.status !== 'downloading'" @click="deleteVideo(v)" class="btn-del">🗑</button>
           </div>
         </div>
         <div v-if="!videos.length" class="empty">No videos found</div>
@@ -222,6 +230,7 @@ const pageSize = 20
 const playing = ref(null)
 const playUrl = ref('')
 const totalPages = computed(() => Math.ceil(total.value / pageSize) || 1)
+let pollTimer = null
 
 // ── Settings / Cleanup ──
 const cleanupStatus = ref(null)
@@ -372,11 +381,29 @@ async function fetchVideos() {
     })
     videos.value = res.data.videos
     total.value = res.data.total
+    // Auto-poll while any video is downloading
+    const hasDownloading = res.data.videos.some(v => v.status === 'downloading')
+    if (hasDownloading && tab.value === 'videos') {
+      if (!pollTimer) pollTimer = setInterval(fetchVideos, 2000)
+    } else {
+      if (pollTimer) { clearInterval(pollTimer); pollTimer = null }
+    }
   } catch (e) {
     if (e.response?.status === 401) { auth.logout(); location.href = '/login' }
   }
 }
 
+async function cancelDownload(v) {
+  try {
+    await axios.post(`/api/download/${v.task_id}/cancel`, {}, { headers: auth.getHeaders() })
+    v.status = 'error'
+    v.error_message = '下载已取消，请重试'
+    await fetchVideos()
+  } catch (e) {
+    alert('Cancel failed: ' + (e.response?.data?.detail || e.message))
+  }
+}
+
 async function fetchStats() {
   try {
     const res = await axios.get('/api/admin/stats', { headers: auth.getHeaders() })
@@ -439,6 +466,14 @@ async function fetchLogs() {
 }
 
 onMounted(() => { fetchVideos(); fetchStats() })
+
+// Clean up poll timer when leaving videos tab
+import { watch, onUnmounted } from 'vue'
+watch(tab, (val) => {
+  if (val !== 'videos' && pollTimer) { clearInterval(pollTimer); pollTimer = null }
+  if (val === 'videos') fetchVideos()
+})
+onUnmounted(() => { if (pollTimer) clearInterval(pollTimer) })
 </script>
 
 <style scoped>
@@ -484,6 +519,12 @@ onMounted(() => { fetchVideos(); fetchStats() })
 .status-pending { color: #888; }
 .status-deleted { color: #555; }
 .platform-tag { color: #1da1f2; font-size: 0.82rem; text-transform: capitalize; }
+.progress-wrap { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.4rem; }
+.progress-bar { flex: 1; max-width: 240px; height: 6px; background: #333; border-radius: 3px; overflow: hidden; }
+.progress-fill { height: 100%; background: #1da1f2; border-radius: 3px; transition: width 0.4s; }
+.progress-pct { font-size: 0.8rem; color: #1da1f2; min-width: 32px; }
+.btn-cancel { padding: 0.4rem 0.8rem; border: 1px solid #e74c3c; border-radius: 6px; background: transparent; color: #e74c3c; cursor: pointer; font-size: 0.85rem; }
+.btn-cancel:hover { background: rgba(231,76,60,0.15); }
 .error-msg {
   color: #e74c3c; font-size: 0.8rem; margin-top: 0.3rem;
   white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 500px;
diff --git a/frontend/src/views/Home.vue b/frontend/src/views/Home.vue
index 8035d69..cabe5bb 100644
--- a/frontend/src/views/Home.vue
+++ b/frontend/src/views/Home.vue
@@ -30,6 +30,7 @@
       <button class="download-btn" @click="startDownload" :disabled="downloading || downloadReady">
         {{ downloading ? '⏳ Downloading...' : downloadReady ? '✅ Downloaded' : '📥 Download' }}
       </button>
+      <button v-if="downloading && taskId" class="cancel-btn" @click="cancelDownload">✕ Cancel</button>
     </div>
 
     <div v-if="taskId" class="task-status">
@@ -123,7 +124,9 @@ async function pollStatus() {
       downloadReady.value = true
       downloadUrl.value = `/api/file/task/${taskId.value}`
     } else if (d.status === 'error') {
-      statusText.value = `❌ Error: ${d.error_message}`
+      const msg = d.error_message || '下载出错，请重试'
+      statusText.value = `❌ ${msg}`
+      error.value = msg
       downloading.value = false
     } else {
       statusText.value = `⏳ ${d.status}... ${d.progress}%`
@@ -133,6 +136,19 @@ async function pollStatus() {
     setTimeout(pollStatus, 3000)
   }
 }
+
+async function cancelDownload() {
+  if (!taskId.value) return
+  try {
+    await axios.post(`/api/download/${taskId.value}/cancel`)
+    downloading.value = false
+    error.value = '下载已取消，请重试'
+    statusText.value = ''
+    progress.value = 0
+  } catch {
+    error.value = '取消失败，请稍后重试'
+  }
+}
 </script>
 
 <style scoped>
@@ -169,6 +185,12 @@ h1 { font-size: 2rem; margin-bottom: 0.5rem; }
 .ext { color: #888; }
 .size { color: #888; margin-left: auto; }
 .download-btn { width: 100%; margin-top: 1rem; padding: 1rem; font-size: 1.1rem; }
+.cancel-btn {
+  width: 100%; margin-top: 0.5rem; padding: 0.7rem; font-size: 0.95rem;
+  border: 1px solid #e74c3c; border-radius: 8px; background: transparent;
+  color: #e74c3c; cursor: pointer;
+}
+.cancel-btn:hover { background: rgba(231,76,60,0.1); }
 .task-status { margin-top: 1.5rem; }
 .progress-bar { height: 8px; background: #333; border-radius: 4px; overflow: hidden; margin-bottom: 0.5rem; }
 .progress-fill { height: 100%; background: #1da1f2; transition: width 0.3s; }