diff --git a/wwwroot/knowledge_bases_list/folder_content.ui b/wwwroot/knowledge_bases_list/folder_content.ui
index ffc7d6d..dd52050 100644
--- a/wwwroot/knowledge_bases_list/folder_content.ui
+++ b/wwwroot/knowledge_bases_list/folder_content.ui
@@ -18,52 +18,42 @@
                     "options": {"spacing": "4px", "alignItems": "center"},
                     "subwidgets": [
                         {"widgettype": "Text", "options": {"text": "📂", "cfontsize": 16}},
-                        {"widgettype": "Text", "options": {"text": "{{params_kw.folder_label or '全部文件'}}", "cfontsize": 16, "fontWeight": "bold", "color": "#333"}},
-                        {"widgettype": "Text", "options": {"text": "({{params_kw.folder_id or 'root'}})", "cfontsize": 11, "color": "#aaa"}}
+                        {"widgettype": "Text", "options": {"text": "{{params_kw.folder_label or '全部文件'}}", "cfontsize": 16, "fontWeight": "bold", "color": "#333"}}
                     ]
                 },
                 {
                     "widgettype": "HBox",
                     "options": {"spacing": "8px"},
                     "subwidgets": [
-                        {"widgettype": "Button", "options": {"label": "📁 上传文件", "bgcolor": "#4a90d9", "color": "#fff"}},
-                        {"widgettype": "Button", "options": {"label": "📂 新建子目录", "bgcolor": "#e8e8e8", "color": "#666"}},
-                        {"widgettype": "Button", "options": {"label": "🗑 删除选中", "bgcolor": "#f56c6c", "color": "#fff"}}
+                        {
+                            "widgettype": "Button",
+                            "options": {"label": "📂 新建子目录", "bgcolor": "#e8e8e8", "color": "#666"},
+                            "binds": [
+                                {
+                                    "wid": "self",
+                                    "event": "tap",
+                                    "actiontype": "urlwidget",
+                                    "target": "app.detail_content",
+                                    "mode": "replace",
+                                    "options": {
+                                        "url": "{{entire_url('/knowledge_bases_list/new_dir_form.ui')}}",
+                                        "params": {
+                                            "kb_id": "{{params_kw.kb_id or ''}}",
+                                            "folder_id": "{{params_kw.folder_id or ''}}",
+                                            "folder_label": "{{params_kw.folder_label or ''}}"
+                                        }
+                                    }
+                                }
+                            ]
+                        }
                     ]
                 }
             ]
         },
-        {
-            "widgettype": "VBox",
-            "options": {
-                "width": "100%",
-                "cheight": 5,
-                "bgcolor": "#f8f9fa",
-                "padding": "12px",
-                "css": "card",
-                "border": "2px dashed #d0d0d0",
-                "alignItems": "center",
-                "justifyContent": "center"
-            },
-            "subwidgets": [
-                {"widgettype": "Text", "options": {"text": "拖拽文件到此处上传到当前目录", "cfontsize": 13, "color": "#888"}}
-            ]
-        },
-        {
-            "widgettype": "HBox",
-            "options": {"width": "100%", "bgcolor": "#f5f5f5", "padding": "8px 12px", "borderBottom": "1px solid #e0e0e0"},
-            "subwidgets": [
-                {"widgettype": "Text", "options": {"text": "文件名", "cfontsize": 12, "fontWeight": "bold", "color": "#888", "cwidth": 18}},
-                {"widgettype": "Text", "options": {"text": "类型", "cfontsize": 12, "fontWeight": "bold", "color": "#888", "cwidth": 6}},
-                {"widgettype": "Text", "options": {"text": "大小", "cfontsize": 12, "fontWeight": "bold", "color": "#888", "cwidth": 6}},
-                {"widgettype": "Text", "options": {"text": "状态", "cfontsize": 12, "fontWeight": "bold", "color": "#888", "cwidth": 6}},
-                {"widgettype": "Text", "options": {"text": "上传时间", "cfontsize": 12, "fontWeight": "bold", "color": "#888"}}
-            ]
-        },
         {
             "widgettype": "Text",
             "options": {
-                "text": "当前目录暂无文件",
+                "text": "当前目录暂无内容",
                 "color": "#aaa",
                 "cfontsize": 13,
                 "halign": "center"
diff --git a/wwwroot/knowledge_bases_list/new_dir_form.ui b/wwwroot/knowledge_bases_list/new_dir_form.ui
new file mode 100644
index 0000000..43cbc24
--- /dev/null
+++ b/wwwroot/knowledge_bases_list/new_dir_form.ui
@@ -0,0 +1,55 @@
+{
+    "widgettype": "VBox",
+    "options": {"spacing": "12px", "padding": "16px"},
+    "subwidgets": [
+        {"widgettype": "Text", "options": {"text": "新建目录", "cfontsize": 18, "fontWeight": "bold"}},
+        {"widgettype": "Text", "options": {"text": "", "cheight": 0.5}},
+        {"widgettype": "Text", "options": {"text": "目录名称"}},
+        {
+            "widgettype": "Input",
+            "options": {"id": "dir_name_input", "width": "100%"}
+        },
+        {
+            "widgettype": "Button",
+            "options": {"label": "创建", "bgcolor": "#4a90d9", "color": "#fff"},
+            "binds": [
+                {
+                    "wid": "self",
+                    "event": "tap",
+                    "actiontype": "urlwidget",
+                    "target": "app.detail_content",
+                    "mode": "replace",
+                    "options": {
+                        "url": "{{entire_url('/knowledge_bases_list/tree_crud.dspy')}}",
+                        "params": {
+                            "action": "create_dir",
+                            "kb_id": "{{params_kw.kb_id or ''}}",
+                            "dir_name": "${app.dir_name_input.text}",
+                            "parent_id": "{{params_kw.folder_id or ''}}"
+                        }
+                    }
+                }
+            ]
+        },
+        {
+            "widgettype": "Button",
+            "options": {"label": "取消", "bgcolor": "#e0e0e0", "color": "#666"},
+            "binds": [
+                {
+                    "wid": "self",
+                    "event": "tap",
+                    "actiontype": "urlwidget",
+                    "target": "app.detail_content",
+                    "mode": "replace",
+                    "options": {
+                        "url": "{{entire_url('/knowledge_bases_list/folder_content.ui')}}",
+                        "params": {
+                            "folder_id": "{{params_kw.folder_id or ''}}",
+                            "folder_label": "{{params_kw.folder_label or ''}}"
+                        }
+                    }
+                }
+            ]
+        }
+    ]
+}
diff --git a/wwwroot/knowledge_bases_list/tree_crud.dspy b/wwwroot/knowledge_bases_list/tree_crud.dspy
new file mode 100644
index 0000000..a68cc5c
--- /dev/null
+++ b/wwwroot/knowledge_bases_list/tree_crud.dspy
@@ -0,0 +1,44 @@
+action = params_kw.get("action", "")
+kb_id = params_kw.get("kb_id", "")
+env = request._run_ns
+
+if action == "create_dir":
+    dir_name = params_kw.get("dir_name", "")
+    parent_id = params_kw.get("parent_id", "")
+    if dir_name:
+        async with get_sor_context(env, 'rag') as sor:
+            dir_id = "dir_" + str(abs(hash(dir_name + parent_id)))[:12]
+            await sor.sqlExe(
+                "INSERT INTO document_chunks (id, doc_id, kb_id, chunk_index, chunk_type, content, description, created_at) "
+                "VALUES (${id}$, '', ${kb_id}$, 0, 'directory', ${name}$, ${parent}$, NOW())",
+                {"id": dir_id, "kb_id": kb_id, "name": dir_name, "parent": parent_id})
+
+elif action == "delete_item":
+    item_id = params_kw.get("item_id", "")
+    if item_id:
+        async with get_sor_context(env, 'rag') as sor:
+            await sor.sqlExe("DELETE FROM document_chunks WHERE id=${id}$", {"id": item_id})
+
+# Return refreshed folder content widget
+folder_id = params_kw.get("folder_id", "")
+folder_label = params_kw.get("folder_label", "")
+folder_label = folder_label or dir_name or "全部文件"
+
+result = {
+    "widgettype": "VBox",
+    "options": {"spacing": "12px"},
+    "subwidgets": [
+        {
+            "widgettype": "HBox",
+            "options": {"spacing": "4px"},
+            "subwidgets": [
+                {"widgettype": "Text", "options": {"text": "📂 " + str(folder_label), "cfontsize": 16, "fontWeight": "bold", "color": "#333"}},
+                {"widgettype": "Text", "options": {"text": "操作成功", "cfontsize": 12, "color": "#50b86c"}}
+            ]
+        },
+        {
+            "widgettype": "Text",
+            "options": {"text": "操作已完成，请刷新目录树", "color": "#888", "cfontsize": 13}
+        }
+    ]
+}