diff --git a/frontend-web/package.json b/frontend-web/package.json
index 1613e744..3b00ed53 100644
--- a/frontend-web/package.json
+++ b/frontend-web/package.json
@@ -57,6 +57,7 @@
     "cmdk": "^1.1.1",
     "codemirror": "^6.0.2",
     "date-fns": "^4.1.0",
+    "dayjs": "^1.11.21",
     "docx": "^9.5.1",
     "dotenv": "^17.2.3",
     "embla-carousel-react": "^8.6.0",
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 7f9db889..197b2e94 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 { PenLine } from 'lucide-react';
+import { BookOpen, PenLine, X } from 'lucide-react';
 
 import { Button } from '@/components/ui/button';
 import { Textarea } from '@/components/ui/textarea';
@@ -11,6 +11,7 @@ import {
   SelectValue,
 } from '@/components/ui/select';
 import { useModels } from '@/core/models/hooks';
+import { useStudioNotebooks, useNotebookSources } from '@/core/studio/hooks';
 
 import type { AIWritingRequest } from '../../types/ai-writing';
 import { useArticleTypes } from '../../hooks/useArticleTypes';
@@ -46,7 +47,13 @@ export function AIWritingForm({
   const [wordCountInput, setWordCountInput] = useState('800');
   const [strictMode, setStrictMode] = useState(false);
   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);
+  const [selectedDocumentIds, setSelectedDocumentIds] = useState<number[]>([]);
+
   const { models, isLoading: modelsLoading } = useModels();
+  const { notebooks, isLoading: notebooksLoading } = useStudioNotebooks();
+  const { sources, isLoading: sourcesLoading } = useNotebookSources(selectedNotebookId);
 
   const { articleTypes, loading: typesLoading, refresh: refreshTypes } = useArticleTypes();
 
@@ -98,6 +105,22 @@ export function AIWritingForm({
     }
   }
 
+  function handleNotebookChange(val: string) {
+    setSelectedNotebookId(val ? Number(val) : null);
+    setSelectedDocumentIds([]);
+  }
+
+  function clearNoteSelection() {
+    setSelectedNotebookId(null);
+    setSelectedDocumentIds([]);
+  }
+
+  function toggleDocument(docId: number) {
+    setSelectedDocumentIds((prev) =>
+      prev.includes(docId) ? prev.filter((id) => id !== docId) : [...prev, docId],
+    );
+  }
+
   function handleSubmit(e: React.FormEvent) {
     e.preventDefault();
     if (!intent.trim()) return;
@@ -112,6 +135,9 @@ export function AIWritingForm({
       keywordCount: DEFAULT_KEYWORD_COUNT,
       writingMode: hideAdvancedFields ? 'loose' : strictMode ? 'strict' : 'loose',
       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,
     });
   }
 
@@ -206,6 +232,82 @@ 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/hooks/useAIWritingStream.ts b/frontend-web/src/open-canvas/hooks/useAIWritingStream.ts
index 0cd2943e..67d35955 100644
--- a/frontend-web/src/open-canvas/hooks/useAIWritingStream.ts
+++ b/frontend-web/src/open-canvas/hooks/useAIWritingStream.ts
@@ -25,6 +25,8 @@ import { useCallback, useEffect, useMemo, useReducer, useRef } from 'react';
 import { useStream } from '@langchain/langgraph-sdk/react';
 
 import { getAPIClient } from '@/core/api';
+import { getStoredAuth } from '@/core/auth';
+import { fetchStudioToken } from '@/core/studio/api';
 
 import { useCanvasGraphContext } from '../contexts/CanvasGraphContext';
 import { saveAIWritingTranscript } from '../api/ai-writing-sessions';
@@ -720,6 +722,19 @@ export function useAIWriting() {
     if (state.status !== 'idle' && state.status !== 'done' && state.status !== 'error') return;
     dispatch({ type: 'start', request });
     try {
+      // 如果选择了笔记来源，获取 notebook token 用于后端检索
+      let notebookToken = '';
+      if (request.noteSearchSpaceId) {
+        const email = getStoredAuth()?.email ?? '';
+        if (email) {
+          try {
+            notebookToken = await fetchStudioToken(email);
+          } catch {
+            // 忽略 token 获取失败，后端会优雅降级
+          }
+        }
+      }
+
       await stream.submit(
         {
           user_intent: request.userIntent,
@@ -738,9 +753,16 @@ export function useAIWriting() {
           current_draft: null,
           review_result: null,
           last_user_intervention: null,
+          notebook_search_space_id: request.noteSearchSpaceId ?? null,
+          notebook_source_ids: request.noteSourceIds ?? [],
         } as Partial<AIWritingValues>,
         {
-          config: { configurable: { model_name: request.modelName ?? '' } } as Record<string, unknown>,
+          config: {
+            configurable: {
+              model_name: request.modelName ?? '',
+              ...(notebookToken ? { notebook_token: notebookToken } : {}),
+            },
+          } as Record<string, unknown>,
           streamMode: ['values', 'updates', 'custom', 'messages-tuple'],
         },
       );
diff --git a/frontend-web/src/open-canvas/types/ai-writing.ts b/frontend-web/src/open-canvas/types/ai-writing.ts
index 2a1e2936..66fc2681 100644
--- a/frontend-web/src/open-canvas/types/ai-writing.ts
+++ b/frontend-web/src/open-canvas/types/ai-writing.ts
@@ -7,7 +7,7 @@ export interface AIMaterial {
   source: string;
   publishedAt: string;
   relevanceScore: number;
-  sourceType: 'internet' | 'intranet' | 'skill';
+  sourceType: 'internet' | 'intranet' | 'skill' | 'notebook';
   url?: string;
   recUuid?: string;
   // skill 类素材的元信息（skill_name / container_path / category / skill_full_content 等）
@@ -227,6 +227,10 @@ 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';
+  /** 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 */
+  noteSourceIds?: number[];
 }
 
 // ── 流式审核条目 ──────────────────────────────────────────────────────────────
diff --git a/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/nodes/researcher.py b/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/nodes/researcher.py
index 1f219e8a..304f4f4c 100644
--- a/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/nodes/researcher.py
+++ b/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/nodes/researcher.py
@@ -1,8 +1,9 @@
-"""素材收集专家节点：关键词提取 → 并发搜索 → 相关度排序。"""
+"""素材收集专家节点：关键词提取 → 并发搜索（含笔记） → 相关度排序。"""
 from __future__ import annotations
 
 import asyncio
 import logging
+import os
 import re
 import uuid
 from typing import List
@@ -20,6 +21,10 @@ from ._utils import get_ai_writing_config, llm_json, safe_get_stream_writer
 
 logger = logging.getLogger(__name__)
 
+_NOTEBOOK_SEARCH_PATH = "/api/v1/source/mentioned-documents/search"
+_NOTEBOOK_MAX_KEYWORDS = 3   # 每次写作最多对笔记发起的检索轮数
+_NOTEBOOK_TOP_K = 5          # 每次检索取回的 chunk 数
+
 # 素材总量上限边界：config.yaml 的 ai_writing.max_materials，非法值回退默认 50
 _DEFAULT_MAX_MATERIALS = 50
 _MIN_MAX_MATERIALS = 1
@@ -89,6 +94,65 @@ def _notice(title: str, detail: str, raw: str = "") -> dict:
     return event
 
 
+async def _search_notebook(
+    keywords: list[str],
+    search_space_id: int,
+    source_ids: list[int],
+    token: str,
+) -> list[Material]:
+    """从笔记 API 按关键词检索内容，返回 source_type='notebook' 的 Material 列表。"""
+    import httpx  # 懒导入：仅在笔记模式下才需要
+
+    base = (os.getenv("DEER_FLOW_NOTEBOOK_API_BASE") or "").rstrip("/")
+    if not base:
+        logger.warning("DEER_FLOW_NOTEBOOK_API_BASE not set, skipping notebook search")
+        return []
+
+    results: list[Material] = []
+    mat_idx = 0
+    try:
+        async with httpx.AsyncClient(timeout=20) as client:
+            for kw in keywords[:_NOTEBOOK_MAX_KEYWORDS]:
+                try:
+                    resp = await client.post(
+                        f"{base}{_NOTEBOOK_SEARCH_PATH}",
+                        headers={"Authorization": f"Bearer {token}"},
+                        json={
+                            "query": kw,
+                            "source_ids": source_ids,
+                            "search_space_id": search_space_id,
+                            "top_k": _NOTEBOOK_TOP_K,
+                        },
+                    )
+                    resp.raise_for_status()
+                    data = resp.json()
+                    # 解析 documents 列表，每个 chunk 作为独立素材
+                    documents: list[dict] = data.get("documents") if isinstance(data, dict) else []
+                    for doc in documents or []:
+                        doc_title: str = doc.get("title") or "笔记文档"
+                        doc_url: str = doc.get("url") or ""
+                        for chunk in doc.get("chunks") or []:
+                            chunk_content: str = (chunk.get("content") or "").strip()
+                            if not chunk_content:
+                                continue
+                            mat_idx += 1
+                            results.append(Material(
+                                id=f"nb{mat_idx:03d}",
+                                title=doc_title,
+                                content=chunk_content[:500],
+                                source=f"笔记·{doc_title}",
+                                source_type="notebook",
+                                relevance_score=1.0,
+                                url=doc_url,
+                            ))
+                except Exception as e:
+                    logger.warning("notebook search kw=%r failed: %s", kw, e)
+    except Exception as e:
+        logger.warning("notebook search client error: %s", e)
+
+    return results
+
+
 async def researcher_node(state: AIWritingState, config: RunnableConfig) -> dict:
     intent = state["user_intent"]
     article_type = state.get("article_type", "analysis")
@@ -167,6 +231,22 @@ async def researcher_node(state: AIWritingState, config: RunnableConfig) -> dict
         if extra_keywords:
             keywords = list(dict.fromkeys(keywords + extra_keywords))
 
+    # Step 1.5: 笔记检索（如果传入了 notebook_search_space_id）
+    notebook_search_space_id: int | None = state.get("notebook_search_space_id")
+    notebook_materials: list[Material] = []
+    if notebook_search_space_id:
+        notebook_source_ids: list[int] = state.get("notebook_source_ids") or []
+        notebook_token: str = cfg.get("notebook_token") or ""
+        _emit("正在检索笔记内容…")
+        notebook_materials = await _search_notebook(
+            keywords[:_NOTEBOOK_MAX_KEYWORDS],
+            notebook_search_space_id,
+            notebook_source_ids,
+            notebook_token,
+        )
+        if notebook_materials:
+            _emit(f"从笔记中获取到 {len(notebook_materials)} 条素材")
+
     # Step 2: 搜索
     # 技能检索：技能不是素材，是"检索策略 / 视角"。流程：
     #   a. SkillPicker 选出按相关度排序的 skills（推 list_skills + select_skills 事件）
@@ -302,10 +382,17 @@ async def researcher_node(state: AIWritingState, config: RunnableConfig) -> dict
     existing_pkg = state.get("material_package")
     if is_skill_search:
         # 技能编排循环已经完成素材累积，直接用 raw_materials_pre 当 raw_materials
+        # 笔记素材追加在技能素材之后
         raw_materials: list[Material] = raw_materials_pre  # type: ignore[name-defined]
+        raw_materials.extend(notebook_materials)
     else:
         seen_urls: set[str] = set()
-        raw_materials = []
+        # 笔记素材优先排在最前面，赋予高相关度
+        raw_materials = list(notebook_materials)
+        for m in notebook_materials:
+            if m.get("url"):
+                seen_urls.add(m["url"])
+
         preserve_existing = existing_pkg and (is_supplement or is_append_only)
         if preserve_existing:
             for m in existing_pkg.get("materials", []):
diff --git a/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/state.py b/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/state.py
index 2420ef50..731c2221 100644
--- a/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/state.py
+++ b/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/state.py
@@ -132,6 +132,9 @@ class AIWritingState(TypedDict):
     keyword_count: int
     # 写作模式：strict=严格依据素材 / loose=可结合通用知识（默认 loose）
     writing_mode: str
+    # 笔记来源（可选）：传入后 researcher 阶段会额外从笔记检索素材
+    notebook_search_space_id: Optional[int]
+    notebook_source_ids: Optional[List[int]]
 
     # Agent A 输出
     material_package: Optional[MaterialPackage]