diff --git a/apps/api/src/lead/lead.module.ts b/apps/api/src/lead/lead.module.ts
index ba4101f..1a65a2b 100644
--- a/apps/api/src/lead/lead.module.ts
+++ b/apps/api/src/lead/lead.module.ts
@@ -4,13 +4,14 @@ import { IntegrationModule } from '../integration/integration.module'
 import { CrawlerModule } from '../crawler/crawler.module'
 import { ProductCategoryModule } from '../product-category/product-category.module'
 import { LeadService } from './lead.service'
+import { MaterialExtractorService } from './material-extractor.service'
 import { LeadController } from './lead.controller'
 import { LeadNotesController } from './lead-notes.controller'
 
 @Module({
   imports: [PrismaModule, IntegrationModule, CrawlerModule, ProductCategoryModule],
   controllers: [LeadController, LeadNotesController],
-  providers: [LeadService],
+  providers: [LeadService, MaterialExtractorService],
   exports: [LeadService],
 })
 export class LeadModule {}
diff --git a/apps/api/src/lead/lead.service.ts b/apps/api/src/lead/lead.service.ts
index b599326..186ac57 100644
--- a/apps/api/src/lead/lead.service.ts
+++ b/apps/api/src/lead/lead.service.ts
@@ -3,6 +3,7 @@ import { PrismaService } from '../prisma/prisma.service'
 import { IntegrationService } from '../integration/integration.service'
 import { ProductCategoryService } from '../product-category/product-category.service'
 import { CategoryInferenceService } from '../product-category/category-inference.service'
+import { MaterialExtractorService } from './material-extractor.service'
 
 @Injectable()
 export class LeadService {
@@ -13,6 +14,7 @@ export class LeadService {
     private integrationService: IntegrationService,
     private categoryService: ProductCategoryService,
     private categoryInference: CategoryInferenceService,
+    private materialExtractor: MaterialExtractorService,
   ) {}
 
   async findAll(params?: { status?: string; level?: string; search?: string; star?: string; source?: string; category?: string; assignedTo?: string; timeRange?: string }) {
@@ -308,6 +310,32 @@ export class LeadService {
         publishArgs.enterpriseName = `${b2bIntegration.name}公司`
       }
 
+    // 预校验: B2B 平台字段长度限制 (tb_inquiry.title varchar(50))
+    // 在调 MCP 之前先报错，避免拿到通用的"服务器内部异常"
+    const TITLE_MAX_LEN = 50
+    if (publishArgs.title && String(publishArgs.title).length > TITLE_MAX_LEN) {
+      const titleLen = String(publishArgs.title).length
+      throw new ServiceUnavailableException(
+        [
+          `发布失败: 询价标题超过 B2B 平台限制(最多 ${TITLE_MAX_LEN} 字)。`,
+          `当前标题长度: ${titleLen} 字`,
+          `建议: ① 把标题精简到 ${TITLE_MAX_LEN} 字以内后再发布; ② 或联系 B2B 平台把 tb_inquiry.title 字段改为 varchar(200) 永久解决。`,
+          `线索标题: ${String(publishArgs.title).slice(0, 40)}${titleLen > 40 ? '...' : ''}`,
+        ].join('\n'),
+      )
+    }
+
+    // 实时提取物料清单（detailUrl 正文 → 标题 → 兜底），传给产业平台 items 字段
+    try {
+      const items = await this.materialExtractor.extractItems(lead)
+      if (items.length > 0) {
+        publishArgs.items = items
+        this.logger.log(`[发布] 物料清单提取完成 leadId=${id} ${items.length} 行`)
+      }
+    } catch (e: any) {
+      this.logger.warn(`[发布] 物料清单提取失败(不阻断发布) leadId=${id}: ${e.message}`)
+    }
+
     const result = await this.integrationService.executeTool<any>(
       b2bIntegration.id,
       'publish_rfq',
@@ -331,9 +359,9 @@ export class LeadService {
     const payload = data.data || data
     const rfqId = payload.rfqId || payload.id || null
     if (!rfqId) {
-      throw new ServiceUnavailableException(
-        `发布失败: B2B 平台返回了响应但未包含询价 ID。响应: ${JSON.stringify(payload).slice(0, 200)}`,
-      )
+      // 识别常见错误模式，给出明确提示
+      const diagnosis = this.diagnosePublishError(lead, payload)
+      throw new ServiceUnavailableException(diagnosis)
     }
     const inquiryNo = payload.orderId || rfqId
     const direvUrl = `${b2bIntegration.endpoint}/inquiry/${rfqId}`
@@ -443,4 +471,54 @@ export class LeadService {
       return []
     }
   }
+
+  /**
+   * 发布失败的诊断提示 — 把产业平台原始错误翻译成明确指引
+   * 输入: lead(知道当前 title/quantity 等) + payload(产业平台响应)
+   * 输出: 给前端展示的友好错误信息
+   */
+  private diagnosePublishError(
+    lead: {
+      title?: string | null
+      quantity?: number | null
+      region?: string | null
+      deadline?: string | null
+    },
+    payload: any,
+  ): string {
+    // 把 payload 序列化用于关键词匹配
+    const raw = JSON.stringify(payload || {}).slice(0, 500)
+    const msg = String(payload?.msg || payload?.message || '')
+
+    // 1. 标题超长（产业平台 tb_inquiry.title 是 varchar(50)）
+    if (
+      /Data truncation|Data too long.*title|column 'title'.*too long/i.test(raw + ' ' + msg)
+    ) {
+      const titleLen = (lead.title || '').length
+      return [
+        '发布失败: 询价标题超过 B2B 平台限制(最多 50 字)。',
+        `当前线索标题长度: ${titleLen} 字`,
+        `建议: ① 把标题精简到 50 字以内; ② 或联系 B2B 平台把 tb_inquiry.title 字段改为 varchar(200)。`,
+        `线索标题: ${(lead.title || '').slice(0, 30)}${titleLen > 30 ? '...' : ''}`,
+      ].join('\n')
+    }
+
+    // 2. 数量字段异常
+    if (/Data too long.*qty|column 'qty'|column 'quantity'/i.test(raw + ' ' + msg)) {
+      return `发布失败: 询价数量字段超过 B2B 平台限制。当前 quantity=${lead.quantity}。建议改成合理数字(≤1000)。`
+    }
+
+    // 3. 企业/用户身份未通过
+    if (/enterprise|user.*id|companyUserId|身份|权限/i.test(msg)) {
+      return `发布失败: B2B 平台校验企业身份未通过(${msg})。请检查运营管理 → 系统配置 → MCP 对接配置的连接状态(状态灯应为绿色"已连接")。`
+    }
+
+    // 4. 必填字段缺失
+    if (/required|不能为空|not.*null|缺失/i.test(msg)) {
+      return `发布失败: B2B 平台提示必填字段缺失(${msg})。线索当前数据：quantity=${lead.quantity ?? '空'} region=${lead.region || '空'} deadline=${lead.deadline || '空'}。请补充完整后再发布。`
+    }
+
+    // 5. 默认：展示原始错误
+    return `发布失败: B2B 平台返回了响应但未包含询价 ID。原因: ${msg || '未知错误'}。响应: ${raw}`
+  }
 }
diff --git a/apps/api/src/lead/material-extractor.service.ts b/apps/api/src/lead/material-extractor.service.ts
new file mode 100644
index 0000000..09e89c0
--- /dev/null
+++ b/apps/api/src/lead/material-extractor.service.ts
@@ -0,0 +1,280 @@
+import { Injectable, Logger } from '@nestjs/common'
+
+const MINIMAX_ENDPOINT = 'https://api.minimaxi.com/v1/chat/completions'
+const MINIMAX_MODEL = process.env.MINIMAX_MODEL || 'MiniMax-M2.7'
+
+const DETAIL_FETCH_TIMEOUT_MS = 10_000 // detailUrl 正文抓取超时
+const TEXT_EXTRACT_TIMEOUT_MS = 30_000 // 正文物料提取超时
+const TITLE_EXTRACT_TIMEOUT_MS = 15_000 // 标题物资名提取超时
+const MAX_INPUT_CHARS = 4000
+
+export interface MaterialItem {
+  productName: string
+  quantity: number
+  unit: string
+  specification?: string
+  brand?: string
+  note?: string
+}
+
+const TEXT_SYSTEM_PROMPT = `你是招标公告物资清单提取助手。从以下公告内容中提取物资/物料明细。
+
+输出格式：纯 JSON 数组，不要解释，不要 markdown 代码块，不要 <think> 标签。
+每项格式：{"productName":"物资名称","quantity":数字,"unit":"单位","specification":"规格型号"}
+
+规则：
+- productName 必填，物资的具体名称（如：电力电缆、水泵、变压器）
+- quantity 提取到的数量，没有就填 1
+- unit 计量单位（件/米/吨/台/批等），没有就填"批"
+- specification 规格型号，没有就填空字符串
+- 最多输出 20 行
+- 如果内容里没有具体物资清单，返回 []`
+
+const TITLE_SYSTEM_PROMPT = `你是物资名称提取助手。从招标公告标题中提取涉及的物资名称。
+
+输出格式：纯 JSON 数组，不要解释，不要 markdown 代码块，不要 <think> 标签。
+每项格式：{"productName":"物资名称"}
+
+规则：
+- 只提取具体的物资/设备名称（如：油浸式电力变压器、电压互感器、水泵、逆变器）
+- 去掉"采购""招标""项目""变更公告"等噪声词
+- 如果标题里有多个物资（用顿号/逗号分隔），每个都提取
+- 如果标题只提到一类物资，提取 1 条
+- 如果完全无法判断物资名称，返回 []`
+
+/**
+ * 物料清单提取服务
+ *
+ * 发布到产业平台时实时提取，降级链：
+ *   1. 抓 detailUrl 正文 → AI 提取多行物料
+ *   2. 抓不到 → AI 从标题提取物资名 (quantity=1, unit="批")
+ *   3. AI 也失败 → 用 lead.title 兜底
+ */
+@Injectable()
+export class MaterialExtractorService {
+  private readonly logger = new Logger(MaterialExtractorService.name)
+
+  /**
+   * 主入口 - 从 Lead 提取物料清单
+   * 全程降级，任何异常都返回至少 1 条兜底数据，不阻断发布
+   */
+  async extractItems(lead: { id: string; title: string; detailUrl?: string | null }): Promise<MaterialItem[]> {
+    const apiKey = process.env.MINIMAX_API_KEY
+    if (!apiKey) {
+      this.logger.warn(`[物料提取] MINIMAX_API_KEY 未配置，走标题兜底 leadId=${lead.id}`)
+      return this.fallbackWithTitle(lead.title)
+    }
+
+    // 第 1 步：尝试抓 detailUrl 正文
+    if (lead.detailUrl) {
+      try {
+        const text = await this.fetchDetailText(lead.detailUrl)
+        if (text.length > 100) {
+          this.logger.log(`[物料提取] 抓到正文 leadId=${lead.id} textLen=${text.length}`)
+          const items = await this.extractFromText(text, apiKey)
+          if (items.length > 0) {
+            this.logger.log(`[物料提取] 正文提取成功 leadId=${lead.id} ${items.length} 行`)
+            return items
+          }
+          this.logger.log(`[物料提取] 正文提取为空，降级标题 leadId=${lead.id}`)
+        } else {
+          this.logger.log(`[物料提取] 正文过短(${text.length}字)，降级标题 leadId=${lead.id}`)
+        }
+      } catch (e: any) {
+        this.logger.warn(`[物料提取] 抓取正文失败 leadId=${lead.id}: ${e.message}`)
+      }
+    }
+
+    // 第 2 步：从标题提取
+    try {
+      const items = await this.extractFromTitle(lead.title, apiKey)
+      if (items.length > 0) {
+        this.logger.log(`[物料提取] 标题提取成功 leadId=${lead.id} ${items.length} 行`)
+        return items
+      }
+    } catch (e: any) {
+      this.logger.warn(`[物料提取] 标题提取失败 leadId=${lead.id}: ${e.message}`)
+    }
+
+    // 第 3 步：兜底
+    this.logger.log(`[物料提取] 走标题兜底 leadId=${lead.id}`)
+    return this.fallbackWithTitle(lead.title)
+  }
+
+  /** 抓 detailUrl HTML 并转纯文本，失败返回空串 */
+  private async fetchDetailText(detailUrl: string): Promise<string> {
+    const r = await fetch(detailUrl, {
+      signal: AbortSignal.timeout(DETAIL_FETCH_TIMEOUT_MS),
+      headers: { 'User-Agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X)' },
+    })
+    if (!r.ok) throw new Error(`HTTP ${r.status}`)
+    const html = await r.text()
+    return this.htmlToText(html)
+  }
+
+  /** 从正文提取物料行 */
+  private async extractFromText(text: string, apiKey: string): Promise<MaterialItem[]> {
+    const truncated = text.length > MAX_INPUT_CHARS
+      ? text.slice(0, MAX_INPUT_CHARS) + '\n[内容过长已截断]'
+      : text
+
+    const content = await this.callMinimax(
+      TEXT_SYSTEM_PROMPT,
+      truncated,
+      apiKey,
+      TEXT_EXTRACT_TIMEOUT_MS,
+      2000,
+    )
+    return this.parseItems(content)
+  }
+
+  /** 从标题提取物资名，自动补 quantity=1 unit=批 */
+  private async extractFromTitle(title: string, apiKey: string): Promise<MaterialItem[]> {
+    const content = await this.callMinimax(
+      TITLE_SYSTEM_PROMPT,
+      title,
+      apiKey,
+      TITLE_EXTRACT_TIMEOUT_MS,
+      800,
+    )
+
+    // 解析 [{productName: "xxx"}, ...]
+    const raw = this.extractJsonArray(content)
+    if (!raw) return []
+    let parsed: any[]
+    try {
+      parsed = JSON.parse(raw)
+    } catch {
+      return []
+    }
+
+    return parsed
+      .filter((item: any) => item && typeof item.productName === 'string' && item.productName.trim())
+      .map((item: any) => ({
+        productName: String(item.productName).trim(),
+        quantity: 1,
+        unit: '批',
+        specification: '',
+      }))
+  }
+
+  /** 调 MiniMax chat completion，返回 choices[0].message.content */
+  private async callMinimax(
+    systemPrompt: string,
+    userContent: string,
+    apiKey: string,
+    timeoutMs: number,
+    maxTokens: number,
+  ): Promise<string> {
+    const r = await fetch(MINIMAX_ENDPOINT, {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${apiKey}`,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({
+        model: MINIMAX_MODEL,
+        messages: [
+          { role: 'system', content: systemPrompt },
+          { role: 'user', content: userContent },
+        ],
+        temperature: 0,
+        max_tokens: maxTokens,
+      }),
+      signal: AbortSignal.timeout(timeoutMs),
+    })
+
+    if (!r.ok) {
+      const errText = await r.text().catch(() => '')
+      throw new Error(`MiniMax API ${r.status}: ${errText.slice(0, 200)}`)
+    }
+
+    const data = (await r.json()) as { choices?: Array<{ message?: { content?: string } }> }
+    const content = data.choices?.[0]?.message?.content || ''
+    if (!content) throw new Error(`MiniMax 返回空: ${JSON.stringify(data).slice(0, 200)}`)
+    return content
+  }
+
+  /** 从 MiniMax 响应解析物料数组，带脏数据清洗 + 字段校验 */
+  private parseItems(content: string): MaterialItem[] {
+    const jsonStr = this.extractJsonArray(content)
+    if (!jsonStr) return []
+
+    let parsed: any[]
+    try {
+      parsed = JSON.parse(jsonStr)
+    } catch {
+      return []
+    }
+    if (!Array.isArray(parsed)) return []
+
+    const items: MaterialItem[] = []
+    for (const raw of parsed) {
+      if (!raw || typeof raw !== 'object') continue
+      const productName = typeof raw.productName === 'string' ? raw.productName.trim() : ''
+      if (!productName) continue
+
+      // quantity 必须是正数
+      let quantity = 1
+      if (typeof raw.quantity === 'number' && raw.quantity > 0) {
+        quantity = raw.quantity
+      } else if (typeof raw.quantity === 'string') {
+        const n = parseFloat(raw.quantity)
+        if (!isNaN(n) && n > 0) quantity = n
+      }
+
+      const unit = typeof raw.unit === 'string' && raw.unit.trim() ? raw.unit.trim() : '批'
+      const specification = typeof raw.specification === 'string' ? raw.specification.trim() : ''
+
+      items.push({ productName, quantity, unit, specification })
+      if (items.length >= 20) break
+    }
+    return items
+  }
+
+  /**
+   * 从模型输出中提取 JSON 数组字符串
+   * 处理 <think> 标签、markdown 代码块、前后缀解释文字
+   */
+  private extractJsonArray(content: string): string | null {
+    // 1. 剥 <think>...</think> 和 <think> 开放标签
+    let s = content
+      .replace(/<\/?think>/g, '')
+      .replace(/\*\*/g, '')
+      .trim()
+
+    // 2. 尝试从 markdown 代码块提取 ```json ... ``` 或 ``` ... ```
+    const codeBlock = s.match(/```(?:json)?\s*([\s\S]*?)```/i)
+    if (codeBlock) s = codeBlock[1].trim()
+
+    // 3. 提取第一个 [...] JSON 数组
+    const match = s.match(/\[[\s\S]*\]/)
+    return match ? match[0] : null
+  }
+
+  /** 兜底：用标题当物资名 */
+  private fallbackWithTitle(title: string): MaterialItem[] {
+    return [{ productName: title || '未命名物资', quantity: 1, unit: '批', specification: '' }]
+  }
+
+  /** HTML 转纯文本（复用 notes-extractor 的清洗逻辑） */
+  private htmlToText(html: string): string {
+    return html
+      .replace(/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi, ' ')
+      .replace(/<style\b[^<]*(?:(?!<\/style>)<[^<]*)*<\/style>/gi, ' ')
+      .replace(/<noscript\b[^<]*(?:(?!<\/noscript>)<[^<]*)*<\/noscript>/gi, ' ')
+      .replace(/<head\b[^<]*(?:(?!<\/head>)<[^<]*)*<\/head>/gi, ' ')
+      .replace(/<!--[\s\S]*?-->/g, ' ')
+      .replace(/<[^>]+>/g, '\n')
+      .replace(/&nbsp;/g, ' ')
+      .replace(/&amp;/g, '&')
+      .replace(/&lt;/g, '<')
+      .replace(/&gt;/g, '>')
+      .replace(/&quot;/g, '"')
+      .replace(/&#(\d+);/g, (_, dec) => String.fromCharCode(Number(dec)))
+      .split('\n')
+      .map(l => l.trim())
+      .filter(l => l.length > 0)
+      .join('\n')
+  }
+}