diff --git a/static/app.js b/static/app.js
index 09abe4f..9299640 100644
--- a/static/app.js
+++ b/static/app.js
@@ -137,7 +137,7 @@
                 id: file._dzFileId,
                 fileName: file.name,
                 totalSize: file.size,
-                progress: file._uploadProgress || 0,
+                progress: isNaN(file._uploadProgress) ? 0 : Math.max(0, Math.min(100, file._uploadProgress || 0)),
                 status: 'uploading',
                 chunks: null,
                 startTime: Date.now()
@@ -155,7 +155,8 @@
         updateProgress(fileId, progress, chunkInfo) {
             const task = this.activeUploads.get(fileId);
             if (task) {
-                task.progress = progress;
+                // 确保progress是有效的数值
+                task.progress = isNaN(progress) ? 0 : Math.max(0, Math.min(100, progress));
                 task.chunks = chunkInfo;
                 this.notifyUIUpdate();
             }
@@ -240,16 +241,19 @@
             const statusIcon = task.status === 'completed' ? '✓' :
                               task.status === 'failed' ? '✗' : '⏳';
 
+            // 确保progress是有效的数值
+            const safeProgress = isNaN(task.progress) ? 0 : Math.max(0, Math.min(100, task.progress));
+
             item.innerHTML = `
                 <div class="item-icon">${getFileIcon(task.fileName)}</div>
                 <div class="item-info">
                     <div class="item-name">${escapeHtml(task.fileName)}</div>
                     <div class="item-progress">
                         <div class="progress-bar">
-                            <div class="progress-fill" style="width: ${task.progress}%"></div>
+                            <div class="progress-fill" style="width: ${safeProgress}%"></div>
                         </div>
                         <div class="progress-text">
-                            <span class="progress-percent">${Math.round(task.progress)}%</span>
+                            <span class="progress-percent">${Math.round(safeProgress)}%</span>
                             ${task.chunks ? `<span class="progress-chunks">(${task.chunks})</span>` : ''}
                         </div>
                     </div>
@@ -568,6 +572,7 @@
 
                 this.on('uploadprogress', function(file, progress, bytesSent, totalBytesSent, totalBytes) {
                     var fileId = file._dzFileId;
+                    var totalProgress = progress; // 默认值
 
                     // 更新悬浮窗中的进度
                     var progressEl = document.getElementById('progress-' + fileId);
@@ -577,7 +582,7 @@
                     if (file.totalChunks > 1) {
                         var currentChunk = file.upload.chunk || 0;
                         var chunkWeight = 100 / file.totalChunks;
-                        var totalProgress = (currentChunk * chunkWeight) + (progress * chunkWeight / 100);
+                        totalProgress = (currentChunk * chunkWeight) + (progress * chunkWeight / 100);
 
                         if (progressEl) {
                             progressEl.style.width = Math.min(totalProgress, 100) + '%';
@@ -589,6 +594,7 @@
                             chunksEl.textContent = (currentChunk + 1) + '/' + file.totalChunks;
                         }
                     } else {
+                        totalProgress = progress;
                         if (progressEl) {
                             progressEl.style.width = progress + '%';
                         }