diff --git a/chat-client/src/views/datasets/components/DocUpload.vue b/chat-client/src/views/datasets/components/DocUpload.vue
index d9a0455..72827b3 100644
--- a/chat-client/src/views/datasets/components/DocUpload.vue
+++ b/chat-client/src/views/datasets/components/DocUpload.vue
@@ -2,7 +2,7 @@
   <div class="doc-upload-container">
     <!-- 步骤条 -->
     <el-steps :active="currentStep" align-center class="upload-steps">
-      <el-step title="选择文件" icon="Upload" />
+      <el-step :title="props.replaceFileId ? '选择替换文件' : '选择文件'" icon="Upload" />
       <el-step title="解析模式" icon="Setting" />
       <el-step :title="getStep3Title()" :icon="getStep3Icon()" />
     </el-steps>
@@ -12,7 +12,7 @@
       <!-- 第一步：文件选择 -->
       <div v-if="currentStep === 0" class="step-panel file-selection">
         <div class="panel-header">
-          <h3>选择要上传的文件</h3>
+          <h3>{{ props.replaceFileId ? '选择要替换的文件' : '选择要上传的文件' }}</h3>
           <p class="panel-description">支持多种文档格式，拖拽或点击选择文件</p>
         </div>
         
@@ -22,7 +22,8 @@
           drag
           :auto-upload="false"
           :on-change="handleFileChange"
-          :file-list="uploadFiles"
+          :file-list="[]"
+          :show-file-list="false"
           :limit="10"
           accept=".txt,.md,.markdown,.mdx,.pdf,.html,.htm,.xlsx,.xls,.doc,.docx,.csv,.vtt,.properties"
           class="upload-area"
@@ -281,7 +282,7 @@
         <!-- 自适应模式 - 确认信息 -->
         <div v-else class="adaptive-confirm">
           <div class="panel-header">
-            <h3>确认上传</h3>
+            <h3>{{ props.replaceFileId ? '确认替换' : '确认上传' }}</h3>
             <p class="panel-description">使用自适应模式，系统将自动选择最佳解析策略</p>
           </div>
 
@@ -321,7 +322,7 @@
         :loading="uploading"
         :disabled="!canUpload()"
       >
-        开始上传
+        {{ props.replaceFileId ? '开始替换' : '开始上传' }}
       </el-button>
       <el-button @click="handleCancel">取消</el-button>
     </div>
@@ -343,19 +344,21 @@ import {
   Tools,
   Check
 } from '@element-plus/icons-vue'
-import { uploadDocument } from '@/api/dataset'
+import { uploadDocument, deleteDocument } from '@/api/dataset'
 
 // Props
 interface Props {
   datasetId: string
   visible: boolean
   parentId?: number
+  replaceFileId?: string
 }
 
 const props = withDefaults(defineProps<Props>(), {
   datasetId: '',
   visible: false,
-  parentId: undefined
+  parentId: undefined,
+  replaceFileId: undefined
 })
 
 // Emits
@@ -435,7 +438,7 @@ const getStep3Title = () => {
   switch (uploadForm.analysisStrategyType) {
     case 'custom': return '参数设置'
     case 'deep': return '处理进度'
-    default: return '确认上传'
+    default: return props.replaceFileId ? '确认替换' : '确认上传'
   }
 }
 
@@ -473,6 +476,14 @@ const handleDragLeave = () => {
 
 const removeFile = (index: number) => {
   uploadFiles.value.splice(index, 1)
+  // 同步更新 el-upload 组件的内部文件列表
+  if (uploadRef.value) {
+    uploadRef.value.clearFiles()
+    // 重新添加剩余文件到 el-upload 组件
+    uploadFiles.value.forEach(file => {
+      uploadRef.value.handleStart(file.raw)
+    })
+  }
 }
 
 const formatFileSize = (size?: number) => {
@@ -548,18 +559,42 @@ const handleUpload = async () => {
 
   const loading = ElLoading.service({
     lock: true,
-    text: '正在上传文件...',
+    text: props.replaceFileId ? '正在替换文件...' : '正在上传文件...',
     background: 'rgba(0, 0, 0, 0.7)'
   })
 
   try {
     uploading.value = true
 
+    // 如果是文件替换，先删除旧文件
+    if (props.replaceFileId) {
+      // 关闭当前loading，显示删除进度
+      loading.close()
+      const deleteLoading = ElLoading.service({
+        lock: true,
+        text: '正在删除旧文件...',
+        background: 'rgba(0, 0, 0, 0.7)'
+      })
+      
+      await deleteDocument(parseInt(props.replaceFileId))
+      deleteLoading.close()
+      
+      // 重新显示上传进度
+      const uploadLoading = ElLoading.service({
+        lock: true,
+        text: '正在上传新文件...',
+        background: 'rgba(0, 0, 0, 0.7)'
+      })
+      // 更新loading引用
+      loading.close = uploadLoading.close
+    }
+
     // 构造请求数据，符合后端DocUploadReq结构
     const requestData: any = {
       datasetId: props.datasetId,
       analysisStrategyType: uploadForm.analysisStrategyType,
-      parentId: props.parentId // 添加parentId参数，根目录时为undefined/null
+      parentId: props.parentId, // 添加parentId参数，根目录时为undefined/null
+      // 注意：删除 replaceFileId，因为我们已经手动删除了旧文件
     }
 
     // 如果是自定义模式，添加解析策略
@@ -599,16 +634,18 @@ const handleUpload = async () => {
     }
 
     ElNotification({
-      title: '上传成功',
-      message: `成功上传 ${uploadFiles.value.length} 个文件`,
+      title: props.replaceFileId ? '替换成功' : '上传成功',
+      message: props.replaceFileId 
+        ? `成功替换 ${uploadFiles.value.length} 个文件` 
+        : `成功上传 ${uploadFiles.value.length} 个文件`,
       type: 'success'
     })
 
     emit('success')
     handleCancel()
   } catch (error) {
-    console.error('上传失败:', error)
-    ElMessage.error('上传失败，请重试')
+    console.error(props.replaceFileId ? '替换失败:' : '上传失败:', error)
+    //ElMessage.error(props.replaceFileId ? '替换失败，请重试' : '上传失败，请重试')
   } finally {
     uploading.value = false
     loading.close()
diff --git a/chat-client/src/views/datasets/components/DocumentList.vue b/chat-client/src/views/datasets/components/DocumentList.vue
index 8e0677a..2d5668d 100644
--- a/chat-client/src/views/datasets/components/DocumentList.vue
+++ b/chat-client/src/views/datasets/components/DocumentList.vue
@@ -139,7 +139,7 @@
                       <span v-else class="folder-indicator">--</span>
                   </template>
               </el-table-column>
-              <el-table-column :label="t('vabI18n.knowledge.document.table.actions')" width="320" fixed="right">
+              <el-table-column :label="t('vabI18n.knowledge.document.table.actions')" width="380" fixed="right">
                   <template #default="{ row }">
                       <div class="action-buttons">
                           <!-- 文件操作 -->
@@ -166,6 +166,15 @@
                               >
                                   {{t('vabI18n.knowledge.document.buttons.download')}}
                               </el-button>
+                              <el-button 
+                                  type="warning" 
+                                  :icon="Upload" 
+                                  text 
+                                  class="action-btn" 
+                                  @click="handleFileReplaceFromRow(row)"
+                              >
+                                  替换
+                              </el-button>
                           </template>
                           <!-- 文件夹操作 -->
                           <template v-else>
@@ -235,6 +244,43 @@
           />
       </el-dialog>
       
+      <!-- 文件替换对话框 -->
+      <el-dialog 
+          v-model="replaceDialogVisible" 
+          title="替换文件" 
+          width="900px" 
+          :close-on-click-modal="false"
+          class="upload-dialog"
+      >
+          <div v-if="replaceTargetFile" class="replace-info">
+              <div class="target-file-info">
+                  <h4>将要替换的文件：</h4>
+                  <div class="file-info-card">
+                      <img 
+                          :src="getFileTypeIcon(replaceTargetFile.fileType)" 
+                          alt="文件图标" 
+                          class="file-icon"
+                      />
+                      <div class="file-details">
+                          <div class="file-name">{{ replaceTargetFile.fileName }}</div>
+                          <div class="file-meta">
+                              <span>大小：{{ formatFileSize(replaceTargetFile.charCount) }}</span>
+                              <span>创建时间：{{ replaceTargetFile.createDate }}</span>
+                          </div>
+                      </div>
+                  </div>
+              </div>
+          </div>
+          <DocUpload 
+              :visible="replaceDialogVisible"
+              :dataset-id="datasetId"
+              :parent-id="currentParentId"
+              :replace-file-id="replaceTargetFile?.id"
+              @update:visible="replaceDialogVisible = $event"
+              @success="handleReplaceSuccess"
+          />
+      </el-dialog>
+      
       <!-- 预览抽屉 -->
       <el-drawer
           v-model="previewDrawerVisible"
@@ -467,6 +513,8 @@ const datasetName = ref('');
 const previewLoading = ref(true)
 
 const uploadDialogVisible = ref(false)
+const replaceDialogVisible = ref(false)
+const replaceTargetFile = ref<FileItem | null>(null)
 
 // 重命名相关
 const renameDialogVisible = ref(false)
@@ -518,6 +566,8 @@ name: string;
 onUnmounted(() => {
 // 清理右键菜单事件监听器
 document.removeEventListener('click', hideContextMenu)
+// 停止自动刷新定时器
+stopAutoRefresh()
 })
 
 const getFileTypeIcon = (fileType: string) => {
@@ -766,6 +816,12 @@ const triggerFileInput = () => {
   uploadDialogVisible.value = true
 }
 
+// 文件替换处理 - 从行操作触发
+const handleFileReplaceFromRow = (row: FileItem) => {
+  replaceTargetFile.value = row
+  replaceDialogVisible.value = true
+}
+
 const indexMethod = (index: number) => {
 return (pagination.current - 1) * pagination.size + index + 1
 }
@@ -776,9 +832,22 @@ return (pagination.current - 1) * pagination.size + index + 1
 const handleUploadSuccess = async () => {
 uploadDialogVisible.value = false
 await fetchDocuments()
+// ElNotification({
+//   title: t('vabI18n.knowledge.document.messages.uploadSuccess'),
+//   message: t('vabI18n.knowledge.document.messages.uploadSuccessEnd'),
+//   type: 'success'
+// })
+}
+
+// 处理文件替换成功回调
+const handleReplaceSuccess = async () => {
+replaceDialogVisible.value = false
+replaceTargetFile.value = null
+selectedRows.value = [] // 清空选择
+await fetchDocuments()
 ElNotification({
-  title: t('vabI18n.knowledge.document.messages.uploadSuccess'),
-  message: t('vabI18n.knowledge.document.messages.uploadSuccessEnd'),
+  title: '替换成功',
+  message: '文件替换成功',
   type: 'success'
 })
 }
@@ -896,6 +965,28 @@ const handlePreview = async (row: FileItem) => {
 // 在script setup部分添加loading状态
 const tableLoading = ref(false)
 
+// 定时器相关
+const refreshTimer = ref<NodeJS.Timeout | null>(null)
+
+// 启动定时器
+const startAutoRefresh = () => {
+  stopAutoRefresh() // 先清除可能存在的定时器
+  refreshTimer.value = setInterval(() => {
+    // 只有在非加载状态下才自动刷新
+    if (!tableLoading.value) {
+      fetchDocuments()
+    }
+  }, 30000) // 5秒刷新一次
+}
+
+// 停止定时器
+const stopAutoRefresh = () => {
+  if (refreshTimer.value) {
+    clearInterval(refreshTimer.value)
+    refreshTimer.value = null
+  }
+}
+
 // 修改fetchDocuments函数
 const fetchDocuments = async () => {
 tableLoading.value = true
@@ -988,7 +1079,7 @@ const typeMap: Record<string, 'success' | 'primary' | 'warning' | 'info' | 'dang
   'preprocessing': 'info',
   'indexing': 'warning', 
   'waiting': 'info',
-  'queued': 'primary',
+  'queued': 'info', // 修改为info类型，显示较深灰色
   'failed': 'danger',
   'completed': 'success'
 }
@@ -1044,6 +1135,8 @@ datasetId.value = route.params.id as string
 datasetName.value  = route.query.name as string
 // 这里可以调用API获取详细数据
 await fetchDocuments()
+// 启动自动刷新定时器
+startAutoRefresh()
 })
 
 // 分页变化处理
@@ -1677,6 +1770,67 @@ border-top: 1px solid #ebeef5;
 
 
 
+// 文件替换信息样式
+.replace-info {
+margin-bottom: 24px;
+padding: 20px;
+background: #f8f9fa;
+border-radius: 8px;
+border-left: 4px solid #e6a23c;
+
+.target-file-info {
+  h4 {
+    margin: 0 0 16px 0;
+    color: #303133;
+    font-size: 16px;
+    font-weight: 600;
+  }
+  
+  .file-info-card {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    padding: 16px;
+    background: white;
+    border-radius: 6px;
+    border: 1px solid #ebeef5;
+    
+    .file-icon {
+      width: 32px;
+      height: 32px;
+      flex-shrink: 0;
+      object-fit: contain;
+    }
+    
+    .file-details {
+      flex: 1;
+      
+      .file-name {
+        font-size: 14px;
+        font-weight: 600;
+        color: #303133;
+        margin-bottom: 4px;
+      }
+      
+      .file-meta {
+        display: flex;
+        gap: 16px;
+        font-size: 12px;
+        color: #909399;
+        
+        span {
+          &:not(:last-child)::after {
+            content: '•';
+            margin-left: 8px;
+            color: #dcdfe6;
+          }
+        }
+      }
+    }
+  }
+}
+}
+
 // 预览抽屉样式
 .preview-drawer {
 ::v-deep .el-drawer__header {
diff --git a/chat-server/src/main/java/com/bjtds/brichat/controller/DatasetDocController.java b/chat-server/src/main/java/com/bjtds/brichat/controller/DatasetDocController.java
index 3c7a026..8d65427 100644
--- a/chat-server/src/main/java/com/bjtds/brichat/controller/DatasetDocController.java
+++ b/chat-server/src/main/java/com/bjtds/brichat/controller/DatasetDocController.java
@@ -111,10 +111,16 @@ public class DatasetDocController {
     @PostMapping("/upload")
     public ResultUtils upload(@RequestPart("file") MultipartFile file,
                               @RequestPart("request") DocUploadReq req) throws Exception{
-        //1. 上传文件并解析到dify平台
-        ResponseEntity<Map> documentByFile = difyDatasetApiService.createDocByFile(req, file,"");
+        try {
+            //1. 上传文件并解析到dify平台
+            ResponseEntity<Map> documentByFile = difyDatasetApiService.createDocByFile(req, file,"");
+        }catch (IllegalArgumentException e){
+            return ResultUtils.error(e.getMessage());
+        }catch (Exception e){
+            return ResultUtils.error("上传文件失败");
+        }
 
-        return ResultUtils.success(documentByFile);
+        return ResultUtils.success(null);
     }