diff --git a/web-admin/src/utils/crm/contract-html-to-docx.test.ts b/web-admin/src/utils/crm/contract-html-to-docx.test.ts
new file mode 100644
index 000000000..03ee9091a
--- /dev/null
+++ b/web-admin/src/utils/crm/contract-html-to-docx.test.ts
@@ -0,0 +1,88 @@
+import assert from 'node:assert/strict'
+import { describe, it } from 'node:test'
+import {
+  buildContractDocxFileName,
+  injectSxWatermarkHtml,
+  parseContractSupplierCode,
+  prepareContractHtmlForDocx,
+  stripContractLogoHtml,
+  toAbsoluteAssetUrls
+} from './contract-html-to-docx'
+
+describe('parseContractSupplierCode', () => {
+  it('parses supplier code from contractNo', () => {
+    assert.equal(parseContractSupplierCode('SX/X-JT20250926002'), 'SX')
+    assert.equal(parseContractSupplierCode('YD/X-JT20250926001'), 'YD')
+  })
+
+  it('defaults to SX when missing or unmatched', () => {
+    assert.equal(parseContractSupplierCode(undefined), 'SX')
+    assert.equal(parseContractSupplierCode(''), 'SX')
+    assert.equal(parseContractSupplierCode('NO-MATCH'), 'SX')
+  })
+})
+
+describe('stripContractLogoHtml', () => {
+  it('removes logo img and logo-only wrapper div', () => {
+    const html =
+      '<div><img src="/logo.gif" alt="logo" /></div><p>正文</p><img src="/watermask.jpg" alt="水印" />'
+    const out = stripContractLogoHtml(html)
+    assert.equal(out.includes('logo.gif'), false)
+    assert.equal(out.includes('正文'), true)
+    assert.equal(out.includes('watermask.jpg'), true)
+  })
+})
+
+describe('toAbsoluteAssetUrls', () => {
+  it('prefixes root-relative src with origin', () => {
+    const out = toAbsoluteAssetUrls(
+      '<img src="/seals/a.png" /><img src="https://cdn.example/x.png" />',
+      'http://localhost:3006'
+    )
+    assert.equal(out.includes('src="http://localhost:3006/seals/a.png"'), true)
+    assert.equal(out.includes('src="https://cdn.example/x.png"'), true)
+  })
+})
+
+describe('injectSxWatermarkHtml', () => {
+  it('prepends watermark image with absolute url', () => {
+    const out = injectSxWatermarkHtml('<p>合同</p>', 'http://localhost:3006/watermask.jpg')
+    assert.equal(out.includes('http://localhost:3006/watermask.jpg'), true)
+    assert.equal(out.includes('alt="水印"'), true)
+    assert.equal(out.includes('<p>合同</p>'), true)
+  })
+})
+
+describe('prepareContractHtmlForDocx', () => {
+  it('adds SX watermark and keeps logo', () => {
+    const out = prepareContractHtmlForDocx({
+      html: '<div><img src="/logo.gif" /></div><p>正文</p>',
+      contractNo: 'SX/X-JT20250926002',
+      origin: 'http://localhost:3006'
+    })
+    assert.equal(out.includes('watermask.jpg'), true)
+    assert.equal(out.includes('logo.gif'), true)
+    assert.equal(out.includes('http://localhost:3006/logo.gif'), true)
+  })
+
+  it('strips logo and skips watermark for non-SX', () => {
+    const out = prepareContractHtmlForDocx({
+      html: '<div><img src="/logo.gif" /></div><p>正文</p>',
+      contractNo: 'YD/X-JT20250926001',
+      origin: 'http://localhost:3006'
+    })
+    assert.equal(out.includes('watermask'), false)
+    assert.equal(out.includes('logo.gif'), false)
+    assert.equal(out.includes('正文'), true)
+  })
+})
+
+describe('buildContractDocxFileName', () => {
+  it('uses contract name and sanitizes illegal chars', () => {
+    assert.equal(buildContractDocxFileName('甲/乙合同', 'SX/X-JT1'), '甲-乙合同合同.docx')
+  })
+
+  it('falls back to contractNo', () => {
+    assert.equal(buildContractDocxFileName('', 'SX/X-JT1'), 'SX-X-JT1合同.docx')
+  })
+})
diff --git a/web-admin/src/utils/crm/contract-html-to-docx.ts b/web-admin/src/utils/crm/contract-html-to-docx.ts
new file mode 100644
index 000000000..61337b082
--- /dev/null
+++ b/web-admin/src/utils/crm/contract-html-to-docx.ts
@@ -0,0 +1,64 @@
+/** 合同打印弹窗：HTML → DOCX 预处理与生成 */
+
+export function parseContractSupplierCode(contractNo?: string | null): string {
+  if (!contractNo) return 'SX'
+  const match = String(contractNo).match(/^([A-Z]+)\/X-JT/)
+  return match?.[1] || 'SX'
+}
+
+export function stripContractLogoHtml(html: string): string {
+  let result = html.replace(/<div[^>]*>\s*<img[^>]*(?:logo\.gif|logo)[^>]*>[\s\S]*?<\/div>/gi, (match) => {
+    if (match.includes('logo.gif') || match.includes('/logo') || (match.includes('logo') && !match.includes('watermask'))) {
+      return ''
+    }
+    return match
+  })
+  result = result.replace(/<img[^>]*(?:logo\.gif|logo)[^>]*(?![^<]*watermask)[^>]*>/gi, '')
+  return result
+}
+
+export function toAbsoluteAssetUrls(html: string, origin: string): string {
+  const base = origin.replace(/\/$/, '')
+  return html.replace(/\bsrc=(["'])(\/[^"']+)\1/gi, (_m, quote: string, path: string) => {
+    return `src=${quote}${base}${path}${quote}`
+  })
+}
+
+export function injectSxWatermarkHtml(html: string, watermarkUrl: string): string {
+  const watermarkBlock = `<div style="text-align:center;margin:8px 0 16px;">
+  <img src="${watermarkUrl}" alt="水印" style="width:50%;max-width:400px;opacity:0.15;" />
+</div>`
+  return `${watermarkBlock}${html}`
+}
+
+export function prepareContractHtmlForDocx(options: {
+  html: string
+  contractNo?: string | null
+  origin: string
+}): string {
+  const origin = options.origin.replace(/\/$/, '')
+  const supplierCode = parseContractSupplierCode(options.contractNo)
+  const isSX = supplierCode === 'SX'
+
+  let html = options.html || ''
+  if (!isSX) {
+    html = stripContractLogoHtml(html)
+  }
+
+  html = toAbsoluteAssetUrls(html, origin)
+
+  if (isSX) {
+    html = injectSxWatermarkHtml(html, `${origin}/watermask.jpg`)
+  }
+
+  return html
+}
+
+export function buildContractDocxFileName(
+  contractName?: string | null,
+  contractNo?: string | null
+): string {
+  const raw = (contractName && String(contractName).trim()) || (contractNo && String(contractNo).trim()) || '合同'
+  const safe = raw.replace(/[/\\:*?"<>|]/g, '-')
+  return `${safe}合同.docx`
+}