diff --git a/public/index.html b/public/index.html
index fa97458..873bc93 100644
--- a/public/index.html
+++ b/public/index.html
@@ -139,8 +139,12 @@
                 <div id="now-playing" class="now-playing hidden">
                     <h3>Now Playing</h3>
                     <p id="current-video-title">video.mp4</p>
-                    <button id="transcode-btn" class="play-btn hidden">Start Transcode</button>
-                    <button id="stop-transcode-btn" class="play-btn stop-btn hidden">Stop Transcode</button>
+                    <div style="display: flex; gap: 0.5rem; margin-top: 1rem; align-items: center; flex-wrap: wrap;">
+                        <button id="transcode-btn" class="play-btn hidden">Start Transcode</button>
+                        <button id="stop-transcode-btn" class="play-btn stop-btn hidden">Stop Transcode</button>
+                        <button id="clear-playing-download-cache-btn" class="action-btn danger hidden">清空下载缓存</button>
+                        <button id="clear-playing-transcode-cache-btn" class="action-btn danger hidden">清空转码缓存</button>
+                    </div>
                 </div>
             </section>
         </main>
diff --git a/server.js b/server.js
index 39a1f83..d362693 100644
--- a/server.js
+++ b/server.js
@@ -566,9 +566,11 @@ app.get('/api/videos', async (req, res) => {
                 const safeBucket = bucket.replace(/[^a-z0-9]/gi, '_');
                 const safeKeySegments = key.split('/').map(segment => segment.replace(/[^a-z0-9]/gi, '_'));
                 const hlsDir = path.join(CACHE_DIR, `hls-${safeBucket}-${safeKeySegments.join('-')}`);
+                const tmpInputPath = path.join(CACHE_DIR, `s3-input-${safeBucket}-${safeKeySegments.join('-')}.tmp`);
                 return {
                     key: key,
-                    hasTranscodeCache: fs.existsSync(hlsDir)
+                    hasTranscodeCache: fs.existsSync(hlsDir),
+                    hasDownloadCache: fs.existsSync(tmpInputPath)
                 };
             });
 
@@ -639,6 +641,26 @@ app.post('/api/clear-video-transcode-cache', async (req, res) => {
     }
 });
 
+app.post('/api/clear-video-download-cache', async (req, res) => {
+    try {
+        const { bucket, key } = req.body;
+        if (!bucket || !key) {
+            return res.status(400).json({ error: 'Bucket and key are required' });
+        }
+        const safeBucket = bucket.replace(/[^a-z0-9]/gi, '_');
+        const safeKeySegments = key.split('/').map(segment => segment.replace(/[^a-z0-9]/gi, '_'));
+        const tmpInputPath = path.join(CACHE_DIR, `s3-input-${safeBucket}-${safeKeySegments.join('-')}.tmp`);
+
+        if (fs.existsSync(tmpInputPath)) {
+            fs.rmSync(tmpInputPath, { force: true });
+        }
+        res.json({ message: 'Download cache cleared for video' });
+    } catch (error) {
+        console.error('Error clearing video download cache:', error);
+        res.status(500).json({ error: 'Failed to clear download cache', detail: error.message });
+    }
+});
+
 app.post('/api/stop-transcode', (req, res) => {
     try {
         const { key } = req.body;