diff --git a/chat-client/src/views/datasets/components/DocumentList.vue b/chat-client/src/views/datasets/components/DocumentList.vue
index 84d909a..6c2fce7 100644
--- a/chat-client/src/views/datasets/components/DocumentList.vue
+++ b/chat-client/src/views/datasets/components/DocumentList.vue
@@ -78,17 +78,18 @@
           </div>
 
           <!-- 文件表格 -->
-          <el-table
-              v-loading="tableLoading"
-              :element-loading-text="$t('vabI18n.knowledge.document.messages.loading')"
-              :data="fileList"
-              stripe
-              class="file-table"
-              :row-style="{ height: '50px' }"
-              :header-row-style="{ height: '50px' }"
-              @selection-change="handleSelectionChange"
-              @row-dblclick="handleRowDoubleClick"
-          >
+            <el-table
+                v-loading="tableLoading"
+                :element-loading-text="$t('vabI18n.knowledge.document.messages.loading')"
+                :data="fileList"
+                stripe
+                class="file-table"
+                :row-style="{ height: '50px' }"
+                :header-row-style="{ height: '50px' }"
+                @selection-change="handleSelectionChange"
+                @row-dblclick="handleRowDoubleClick"
+                @sort-change="handleSortChange"
+            >
               <el-table-column type="selection" width="55" />
               <el-table-column
                   :label="$t('vabI18n.knowledge.document.table.index')"
@@ -97,7 +98,7 @@
                   type="index"
                   :index="indexMethod"
               />
-              <el-table-column prop="fileName" :label="t('vabI18n.knowledge.document.table.fileName')" min-width="250">
+              <el-table-column prop="fileName" :label="t('vabI18n.knowledge.document.table.fileName')" min-width="250" sortable="custom" :sort-orders="['ascending', 'descending']">
                   <template #default="{ row }">
                       <div class="file-name-cell">
                           <img
@@ -132,14 +133,14 @@
                       <span v-else class="folder-status">--</span>
                   </template>
               </el-table-column>
-              <el-table-column prop="createDate" :label="t('vabI18n.knowledge.document.table.createDate')" width="180" />
-              <el-table-column prop="charCount" :label="t('vabI18n.knowledge.document.table.charCount')" width="120" align="right">
+              <el-table-column prop="createDate" :label="t('vabI18n.knowledge.document.table.createDate')" width="180" sortable="custom" :sort-orders="['ascending', 'descending']" />
+              <el-table-column prop="charCount" :label="t('vabI18n.knowledge.document.table.charCount')" width="120" align="right" sortable="custom" :sort-orders="['ascending', 'descending']">
                   <template #default="{ row }">
                       <span class="char-count" v-if="row.type === 'file'">{{ formatFileSize(row.charCount) }}</span>
                       <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 +167,15 @@
                               >
                                   {{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>
@@ -234,6 +244,43 @@
               @success="handleUploadSuccess"
           />
       </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 -->
 
@@ -312,7 +359,7 @@
 
     <el-dialog
       v-model="previewDialogVisible"
-      :title="分段详情"
+      title="分段详情"
       :direction="'rtl'"
       size="80%"
     class="preview-drawer"
@@ -513,7 +560,7 @@ const segmentIsLoading = ref(false)
 const segmentPage = ref(2)
 const segmentPageSize = ref(10)
 const segmentdocId = ref('')
-const previewSegment = ref("")
+const previewSegment = ref<any>({})
 const previewDialogVisible = ref(false)
 const route = useRoute();
 const router = useRouter();
@@ -522,6 +569,8 @@ 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)
@@ -577,6 +626,8 @@ const handleClose = () => {
 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) => {
@@ -829,6 +880,12 @@ 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
 }
@@ -839,9 +896,22 @@ 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'
 })
 }
@@ -971,6 +1041,34 @@ 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)
+
+// 排序数据
+const sortConfig = reactive({
+orderBy: 'name',
+orderDirection: 'ASC'
+})
+
+// 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) // 30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
@@ -979,8 +1077,8 @@ try {
     difyDatasetId: datasetId.value,
     parentId: currentParentId.value, // 使用当前文件夹ID
     fileName: searchKeyword.value || undefined,
-    orderBy: 'name',
-    orderDirection: 'ASC',
+    orderBy: sortConfig.orderBy,
+    orderDirection: sortConfig.orderDirection,
     pageNo: pagination.current,
     pageSize: pagination.size
   }
@@ -1119,6 +1217,8 @@ 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
@@ -1132,6 +1232,25 @@ pagination.current = 1
 fetchDocuments()
 }
 
+// 排序变化处理
+const handleSortChange = (sortInfo: any) => {
+  if (sortInfo.prop && sortInfo.order) {
+    // 映射前端字段到后端字段
+    const fieldMapping: Record<string, string> = {
+      'fileName': 'name',
+      'createDate': 'created_at',
+      'charCount': 'size'
+    }
+    
+    sortConfig.orderBy = fieldMapping[sortInfo.prop] || sortInfo.prop
+    sortConfig.orderDirection = sortInfo.order === 'ascending' ? 'ASC' : 'DESC'
+    
+    // 重置到第一页并刷新数据
+    pagination.current = 1
+    fetchDocuments()
+  }
+}
+
 // 处理文件夹打开
 const handleOpenFolder = (row: FileItem) => {
 // 设置当前文件夹ID并更新面包屑路径
@@ -2337,20 +2456,21 @@ transform: scale(0.9) translateY(-5px);
       word-break: break-word; // 防止长文本溢出
     }
 
-    h4 {
-      font-family: "Microsoft YaHei", "微软雅黑", sans-serif; // 设置微软雅黑字体
-      font-size: 14px;
-      font-weight: 600;
-      color: #4a4a4a;
-      margin: 0;
-      line-height: 1.6;
-      display: -webkit-box;
-      -webkit-line-clamp: 4;
-      -webkit-box-orient: vertical;
-      overflow: hidden;
-      text-overflow: ellipsis;
-      word-break: break-word;
-    }
+      h4 {
+        font-family: "Microsoft YaHei", "微软雅黑", sans-serif; // 设置微软雅黑字体
+        font-size: 14px;
+        font-weight: 600;
+        color: #4a4a4a;
+        margin: 0;
+        line-height: 1.6;
+        display: -webkit-box;
+        -webkit-line-clamp: 4;
+        line-clamp: 4;
+        -webkit-box-orient: vertical;
+        overflow: hidden;
+        text-overflow: ellipsis;
+        word-break: break-word;
+      }
   }
 
   .empty-state {
@@ -2442,4 +2562,64 @@ transform: scale(0.9) translateY(-5px);
 
 
 
+// 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;
+            }
+          }
+        }
+      }
+    }
+  }
+}
 </style>
diff --git a/chat-server/src/main/java/com/bjtds/brichat/service/dify/impl/DifyDatasetApiServiceImpl.java b/chat-server/src/main/java/com/bjtds/brichat/service/dify/impl/DifyDatasetApiServiceImpl.java
index 08e490a..b058d94 100644
--- a/chat-server/src/main/java/com/bjtds/brichat/service/dify/impl/DifyDatasetApiServiceImpl.java
+++ b/chat-server/src/main/java/com/bjtds/brichat/service/dify/impl/DifyDatasetApiServiceImpl.java
@@ -172,7 +172,7 @@ public class DifyDatasetApiServiceImpl implements DifyDatasetApiService {
         
 
         // 5. 如果是深度解析，提交到队列处理
-        if (DifyConstants.ANALYSIS_STRATEGY_DEEP.equals(request.getAnalysisStrategyType())) {
+        if (DifyConstants.ANALYSIS_STRATEGY_DEEP.equals(request.getAnalysisStrategyType()) && "pdf".equals(fileExtension)) {
             stepStartTime = System.currentTimeMillis();
             logger.info("开始PDF深度解析队列处理");
             
@@ -630,7 +630,7 @@ public class DifyDatasetApiServiceImpl implements DifyDatasetApiService {
             }
             return strategy;
             } else {
-            List<DocAnalysisStrategy> strategies = docAnalysisStrategyService.queryByName(analysisStrategyType);
+            List<DocAnalysisStrategy> strategies = docAnalysisStrategyService.queryByName("adaption");
             if (strategies == null || strategies.isEmpty()) {
                 throw new DifyServiceException(DifyConstants.ERROR_STRATEGY_NULL);
             }