diff --git a/frontend-web/src/open-canvas/components/ai-writing/AIWritingForm.tsx b/frontend-web/src/open-canvas/components/ai-writing/AIWritingForm.tsx
index 156b0121..cea4e052 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/AIWritingForm.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/AIWritingForm.tsx
@@ -1,5 +1,5 @@
 import { useEffect, useMemo, useState } from 'react';
-import { BookOpen, PenLine, X } from 'lucide-react';
+import { PenLine } from 'lucide-react';
 
 import { Button } from '@/components/ui/button';
 import { Textarea } from '@/components/ui/textarea';
@@ -30,13 +30,14 @@ const INPUT_CLASS =
 
 const DEFAULT_KEYWORD_COUNT = 1;
 const DEFAULT_AUDIENCE = '普通读者';
-const DEFAULT_MATERIAL_SOURCE: 'knowledge_base' | 'skill' = 'knowledge_base';
+type MaterialSource = 'knowledge_base' | 'skill' | 'notebook';
+const DEFAULT_MATERIAL_SOURCE: MaterialSource = 'knowledge_base';
 const MAX_INTENT_LENGTH = 500;
 
-// 素材来源选项：知识库=素材专家默认 web/intranet 检索；技能检索=用技能编排去检索
-const MATERIAL_SOURCE_OPTIONS: Array<{ value: 'knowledge_base' | 'skill'; label: string }> = [
-  { value: 'knowledge_base', label: '知识库' },
-  { value: 'skill', label: '技能检索' },
+const MATERIAL_SOURCE_OPTIONS: Array<{ value: MaterialSource; label: string; desc: string }> = [
+  { value: 'knowledge_base', label: '知识库', desc: '默认 web/intranet 检索' },
+  { value: 'skill', label: '技能检索', desc: '用已启用的技能编排检索' },
+  { value: 'notebook', label: '我的笔记', desc: '从笔记本中检索素材' },
 ];
 
 const FIELD_LABEL_CLASS = 'text-[16px] font-semibold leading-none text-[#222]';
@@ -53,8 +54,7 @@ export function AIWritingForm({
   const [audience, setAudience] = useState('普通读者');
   const [wordCountInput, setWordCountInput] = useState('800');
   const [strictMode, setStrictMode] = useState(false);
-  const [materialSource, setMaterialSource] =
-    useState<'knowledge_base' | 'skill'>(DEFAULT_MATERIAL_SOURCE);
+  const [materialSource, setMaterialSource] = useState<MaterialSource>(DEFAULT_MATERIAL_SOURCE);
   const [modelName, setModelName] = useState('');
   // 笔记来源：选中的 search_space_id 和多个 document_id
   const [selectedNotebookId, setSelectedNotebookId] = useState<number | null>(null);
@@ -119,9 +119,12 @@ export function AIWritingForm({
     setSelectedDocumentIds([]);
   }
 
-  function clearNoteSelection() {
-    setSelectedNotebookId(null);
-    setSelectedDocumentIds([]);
+  function handleMaterialSourceChange(val: MaterialSource) {
+    setMaterialSource(val);
+    if (val !== 'notebook') {
+      setSelectedNotebookId(null);
+      setSelectedDocumentIds([]);
+    }
   }
 
   function toggleDocument(docId: number) {
@@ -145,9 +148,9 @@ export function AIWritingForm({
       writingMode: hideAdvancedFields ? 'loose' : strictMode ? 'strict' : 'loose',
       materialSource,
       modelName: selectedModel?.name || modelName || undefined,
-      noteSearchSpaceId: selectedNotebookId ?? undefined,
-      // 有勾选文档则传 document_id 列表，否则传空数组（搜整个笔记本）
-      noteSourceIds: selectedNotebookId != null ? selectedDocumentIds : undefined,
+      // 只有选了"我的笔记"才传笔记参数
+      noteSearchSpaceId: materialSource === 'notebook' ? (selectedNotebookId ?? undefined) : undefined,
+      noteSourceIds: materialSource === 'notebook' && selectedNotebookId != null ? selectedDocumentIds : undefined,
     });
   }
 
@@ -218,7 +221,7 @@ export function AIWritingForm({
           <label className={FIELD_LABEL_CLASS}>素材来源</label>
           <Select
             value={materialSource}
-            onValueChange={(v) => setMaterialSource(v as 'knowledge_base' | 'skill')}
+            onValueChange={(v) => handleMaterialSourceChange(v as MaterialSource)}
             disabled={disabled}
           >
             <SelectTrigger className={FIELD_TRIGGER_CLASS}>
@@ -228,13 +231,64 @@ export function AIWritingForm({
               {MATERIAL_SOURCE_OPTIONS.map((opt) => (
                 <SelectItem key={opt.value} value={opt.value} className="text-sm">
                   {opt.label}
+                  <span className="ml-1 text-xs text-muted-foreground">— {opt.desc}</span>
                 </SelectItem>
               ))}
             </SelectContent>
           </Select>
-          <p className="text-xs leading-relaxed text-muted-foreground/80">
-            知识库：素材专家默认检索方式；技能检索：用已启用的技能去编排检索。
-          </p>
+
+          {/* 选了"我的笔记"才展示笔记本 / 文档选择器 */}
+          {materialSource === 'notebook' && (
+            <div className="mt-2 space-y-2">
+              <Select
+                value={selectedNotebookId !== null ? String(selectedNotebookId) : ''}
+                onValueChange={handleNotebookChange}
+                disabled={disabled || notebooksLoading}
+              >
+                <SelectTrigger className={FIELD_TRIGGER_CLASS}>
+                  <SelectValue placeholder={notebooksLoading ? '加载中…' : '选择笔记本'} />
+                </SelectTrigger>
+                <SelectContent>
+                  {notebooks.map((nb) => (
+                    <SelectItem key={nb.id} value={String(nb.id)} className="text-sm">
+                      {nb.name}
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+
+              {selectedNotebookId !== null && (
+                <div className="space-y-1">
+                  <p className="text-xs text-muted-foreground">
+                    {sourcesLoading
+                      ? '文档加载中…'
+                      : `选择文档（可多选；不选则搜整个笔记本${selectedDocumentIds.length > 0 ? `，已选 ${selectedDocumentIds.length} 篇` : ''}）`}
+                  </p>
+                  {!sourcesLoading && (
+                    <div className="max-h-36 overflow-y-auto rounded-lg border border-[#e8dedd] bg-white divide-y divide-[#f0e8e7]">
+                      {sources.filter((s) => s.document?.id != null).map((s) => {
+                        const docId = s.document!.id;
+                        return (
+                          <label key={s.id} className="flex items-center gap-2 px-3 py-2 cursor-pointer hover:bg-[#f9f5f5] select-none">
+                            <input
+                              type="checkbox"
+                              checked={selectedDocumentIds.includes(docId)}
+                              onChange={() => toggleDocument(docId)}
+                              disabled={disabled}
+                              className="size-3.5 shrink-0 accent-primary"
+                            />
+                            <span className="text-xs text-foreground truncate">
+                              {s.document?.title ?? `文档 ${docId}`}
+                            </span>
+                          </label>
+                        );
+                      })}
+                    </div>
+                  )}
+                </div>
+              )}
+            </div>
+          )}
         </div>
 
         <div className="mt-4 space-y-2">
@@ -265,82 +319,6 @@ export function AIWritingForm({
           </Select>
         </div>
 
-        {/* 笔记来源（可选） */}
-        <div className="mt-4 rounded-xl border border-[#e8dedd] bg-[#f9f5f5] px-3 py-3 space-y-2">
-          <div className="flex items-center justify-between">
-            <div className="flex items-center gap-1.5">
-              <BookOpen className="size-3.5 text-[#8b6f6f]" />
-              <span className="text-sm font-semibold text-foreground">笔记来源（可选）</span>
-            </div>
-            {selectedNotebookId !== null && (
-              <button
-                type="button"
-                onClick={clearNoteSelection}
-                className="flex items-center gap-0.5 text-xs text-muted-foreground hover:text-foreground"
-              >
-                <X className="size-3" />
-                清除
-              </button>
-            )}
-          </div>
-
-          <Select
-            value={selectedNotebookId !== null ? String(selectedNotebookId) : ''}
-            onValueChange={handleNotebookChange}
-            disabled={disabled || notebooksLoading}
-          >
-            <SelectTrigger className={FIELD_TRIGGER_CLASS}>
-              <SelectValue placeholder={notebooksLoading ? '加载中…' : '选择笔记本（可不选）'} />
-            </SelectTrigger>
-            <SelectContent>
-              {notebooks.map((nb) => (
-                <SelectItem key={nb.id} value={String(nb.id)} className="text-sm">
-                  {nb.name}
-                </SelectItem>
-              ))}
-            </SelectContent>
-          </Select>
-
-          {selectedNotebookId !== null && (
-            <div className="space-y-1">
-              <p className="text-xs text-muted-foreground">
-                {sourcesLoading
-                  ? '文档加载中…'
-                  : sources.filter((s) => s.document?.id != null).length === 0
-                    ? '该笔记本暂无文档'
-                    : `选择文档（可多选；不选则搜索整个笔记本${selectedDocumentIds.length > 0 ? `，已选 ${selectedDocumentIds.length} 篇` : ''}）`}
-              </p>
-              {!sourcesLoading && (
-                <div className="max-h-40 overflow-y-auto rounded-lg border border-[#e8dedd] bg-white divide-y divide-[#f0e8e7]">
-                  {sources
-                    .filter((s) => s.document?.id != null)
-                    .map((s) => {
-                      const docId = s.document!.id;
-                      const checked = selectedDocumentIds.includes(docId);
-                      return (
-                        <label
-                          key={s.id}
-                          className="flex items-center gap-2 px-3 py-2 cursor-pointer hover:bg-[#f9f5f5] select-none"
-                        >
-                          <input
-                            type="checkbox"
-                            checked={checked}
-                            onChange={() => toggleDocument(docId)}
-                            disabled={disabled}
-                            className="size-3.5 shrink-0 accent-primary"
-                          />
-                          <span className="text-xs text-foreground truncate">
-                            {s.document?.title ?? `文档 ${docId}`}
-                          </span>
-                        </label>
-                      );
-                    })}
-                </div>
-              )}
-            </div>
-          )}
-        </div>
-
         <Button
           type="submit"
           disabled={disabled || !intent.trim()}
diff --git a/frontend-web/src/open-canvas/types/ai-writing.ts b/frontend-web/src/open-canvas/types/ai-writing.ts
index a8ccc9fb..358f3800 100644
--- a/frontend-web/src/open-canvas/types/ai-writing.ts
+++ b/frontend-web/src/open-canvas/types/ai-writing.ts
@@ -228,8 +228,8 @@ export interface AIWritingRequest {
   keywordCount: number;
   /** 写作模式：strict=严格依据素材 / loose=可结合通用知识（默认 loose） */
   writingMode: 'strict' | 'loose';
-  /** 素材来源：knowledge_base=知识库（默认检索）/ skill=技能检索（默认 knowledge_base） */
-  materialSource: 'knowledge_base' | 'skill';
+  /** 素材来源：knowledge_base=知识库 / skill=技能检索 / notebook=我的笔记 */
+  materialSource: 'knowledge_base' | 'skill' | 'notebook';
   /** 笔记来源（可选）：笔记本 search_space_id */
   noteSearchSpaceId?: number;
   /** 笔记来源（可选）：笔记本内指定文档的 document_id 列表，空数组表示检索整个笔记本 */