diff --git a/apps/backend/src/services/worker-platform/admin-kuaishou-match-service.ts b/apps/backend/src/services/worker-platform/admin-kuaishou-match-service.ts
index 9e3a2a26..2ea08d82 100644
--- a/apps/backend/src/services/worker-platform/admin-kuaishou-match-service.ts
+++ b/apps/backend/src/services/worker-platform/admin-kuaishou-match-service.ts
@@ -24,6 +24,7 @@ import {
   safeParseJson,
 } from '../admin/admin-query-utils.js'
 import {
+  diagnoseUnmatchedProductRules,
   mapWorkProductRule,
   normalizeBoolean,
   normalizeOptionalId,
@@ -359,12 +360,26 @@ export async function testAdminKuaishouProductMatch(payload: JsonObject = {}) {
     legacyFallbackEnabled: getWorkerProductMatchConfig().legacyFallbackEnabled,
   })
   const context = resolveKuaishouWorkProductMatchContext(item)
+  const diagnostics = {
+    outSkuSn,
+    orderProvider: order.provider,
+    orderPlatform: order.platform,
+    orderShopId: order.shop_id,
+    contextSellerId: context.sellerId,
+    legacyFallbackEnabled: getWorkerProductMatchConfig().legacyFallbackEnabled,
+    useLegacyFallback: !context.sellerId || getWorkerProductMatchConfig().legacyFallbackEnabled,
+    enabledRules: rules.length,
+    enabledMappings: mappings.length,
+    rejectSamples:
+      decision.reason === 'matched' ? [] : diagnoseUnmatchedProductRules(order, item, rules, 10),
+  }
   return {
     context,
     status: decision.reason,
     mappingId: decision.mappingId,
     rule: decision.rule ? mapWorkProductRule(decision.rule) : null,
     candidates: decision.candidates,
+    diagnostics,
   }
 }
 
diff --git a/apps/backend/src/services/worker-platform/mappers.ts b/apps/backend/src/services/worker-platform/mappers.ts
index 17651a93..6b9162d3 100644
--- a/apps/backend/src/services/worker-platform/mappers.ts
+++ b/apps/backend/src/services/worker-platform/mappers.ts
@@ -98,6 +98,8 @@ export {
 
 export {
   type KuaishouWorkProductMatchContext,
+  type WorkProductRuleRejectSample,
+  diagnoseUnmatchedProductRules,
   mapWorkProductRule,
   matchesOptionalText,
   normalizeWorkProductRuleMatch,
diff --git a/apps/backend/src/services/worker-platform/work-product-match-mappers.ts b/apps/backend/src/services/worker-platform/work-product-match-mappers.ts
index 9913f4fb..bf8275e5 100644
--- a/apps/backend/src/services/worker-platform/work-product-match-mappers.ts
+++ b/apps/backend/src/services/worker-platform/work-product-match-mappers.ts
@@ -236,8 +236,7 @@ function scoreWorkProductRuleMapping(
 }
 
 function scoreWorkProductRule(order: OrderRow, item: OrderItemRow, rule: WorkProductRuleRow) {
-  if (!matchesOptionalText(rule.provider, order.provider)) return null
-  if (!matchesOptionalText(rule.platform, order.platform)) return null
+  if (!matchesRuleProviderPlatform(rule, order)) return null
 
   const snapshot = safeParseJson(item.item_snapshot_json)
   const source = safeParseJson(snapshot.kuaishouSendCode)
@@ -317,20 +316,121 @@ function scoreWorkProductRule(order: OrderRow, item: OrderItemRow, rule: WorkPro
     .filter(Boolean)
   const ruleSkuCode = normalizeMatchId(rule.sku_code)
   const ruleProductName = normalizeMatchText(rule.product_name)
+  const skuCodeMatched = Boolean(ruleSkuCode && skuCodes.includes(ruleSkuCode))
+  const productNameMatched = ruleProductName
+    ? rule.match_type === 'exact'
+      ? skuNames.includes(ruleProductName) || skuCodes.includes(ruleProductName)
+      : skuNames.some((value) => value.includes(ruleProductName)) ||
+        skuCodes.some((value) => value.includes(ruleProductName))
+    : false
 
-  if (ruleSkuCode && !skuCodes.includes(ruleSkuCode)) return null
-  if (!ruleProductName) {
-    return ruleSkuCode ? { rule, score: 120 } : null
+  // sku_code 与 product_name 任一命中即可（不再要求两者同时成立，避免误填的 sku_code 挡住 out_sku_sn）
+  if (!skuCodeMatched && !productNameMatched) return null
+  if (skuCodeMatched && productNameMatched) {
+    return { rule, score: rule.match_type === 'exact' ? 300 : 220 }
   }
-  if (rule.match_type === 'exact') {
-    return skuNames.includes(ruleProductName) || skuCodes.includes(ruleProductName)
-      ? { rule, score: ruleSkuCode ? 300 : 150 }
-      : null
+  if (skuCodeMatched) return { rule, score: 120 }
+  return { rule, score: rule.match_type === 'exact' ? 150 : 100 }
+}
+
+/** 拼多多常复用原快手模板；来源/平台残留 91kaquan、kuaishou 时不拦截 out_sku_sn 模板名匹配。 */
+function matchesRuleProviderPlatform(rule: WorkProductRuleRow, order: OrderRow) {
+  if (
+    matchesOptionalText(rule.provider, order.provider) &&
+    matchesOptionalText(rule.platform, order.platform)
+  ) {
+    return true
   }
-  return skuNames.some((value) => value.includes(ruleProductName)) ||
-    skuCodes.some((value) => value.includes(ruleProductName))
-    ? { rule, score: ruleSkuCode ? 220 : 100 }
-    : null
+  const orderProvider = String(order.provider || '')
+    .trim()
+    .toLowerCase()
+  const orderPlatform = String(order.platform || '')
+    .trim()
+    .toLowerCase()
+  const orderIsPdd = orderProvider === 'pdd' || orderPlatform === 'pdd'
+  if (!orderIsPdd) return false
+
+  const ruleProvider = String(rule.provider || '')
+    .trim()
+    .toLowerCase()
+  const rulePlatform = String(rule.platform || '')
+    .trim()
+    .toLowerCase()
+  const providerOk = !ruleProvider || ruleProvider === 'pdd' || ruleProvider === '91kaquan'
+  const platformOk = !rulePlatform || rulePlatform === 'pdd' || rulePlatform === 'kuaishou'
+  return providerOk && platformOk
+}
+
+export type WorkProductRuleRejectSample = {
+  ruleKey: string
+  productName: string
+  provider: string
+  platform: string
+  shopId: string
+  skuCode: string
+  reason: string
+}
+
+/** 诊断未命中原因：找出与订单 SKU/标题相近但被过滤的模板。 */
+export function diagnoseUnmatchedProductRules(
+  order: OrderRow,
+  item: OrderItemRow,
+  rules: WorkProductRuleRow[],
+  limit = 8,
+): WorkProductRuleRejectSample[] {
+  const snapshot = safeParseJson(item.item_snapshot_json)
+  const outSkuSn = String(snapshot.out_sku_sn || snapshot.outSkuSn || '').trim()
+  const needle = normalizeMatchText(
+    outSkuSn || item.sku_name || item.sku_code || snapshot.spec || '',
+  )
+  const samples: WorkProductRuleRejectSample[] = []
+  for (const rule of rules) {
+    if (!rule.enabled) continue
+    const productName = normalizeMatchText(rule.product_name)
+    const skuCode = normalizeMatchId(rule.sku_code)
+    const related =
+      !needle ||
+      productName.includes(needle) ||
+      needle.includes(productName) ||
+      (skuCode && (skuCode.includes(needle) || needle.includes(skuCode)))
+    if (!related && needle) continue
+
+    const scored = scoreWorkProductRule(order, item, rule)
+    if (scored) continue
+
+    let reason = 'name_or_sku_not_matched'
+    if (!matchesRuleProviderPlatform(rule, order)) {
+      reason = `provider_platform_mismatch(rule=${rule.provider || '-'}/${rule.platform || '-'}, order=${order.provider || '-'}/${order.platform || '-'})`
+    } else {
+      const ruleShopId = normalizeMatchId(rule.shop_id)
+      const source = safeParseJson(snapshot.kuaishouSendCode)
+      const sellerId = normalizeMatchId(source.sellerId)
+      if (ruleShopId && ruleShopId !== normalizeMatchId(order.shop_id) && ruleShopId !== sellerId) {
+        reason = `shop_id_mismatch(rule=${rule.shop_id}, order=${order.shop_id || '-'})`
+      } else {
+        const match = safeParseJson(rule.match_json)
+        const hasStructuredMatch = Object.entries(match).some(
+          ([key, value]) =>
+            !['itemTitleMatchType', 'skuNickMatchType'].includes(key) && String(value || '').trim(),
+        )
+        if (hasStructuredMatch && sellerId) {
+          reason = 'structured_match_failed'
+        }
+      }
+    }
+
+    samples.push({
+      ruleKey: rule.rule_key,
+      productName: rule.product_name || '',
+      provider: rule.provider || '',
+      platform: rule.platform || '',
+      shopId: rule.shop_id || '',
+      skuCode: rule.sku_code || '',
+      reason,
+    })
+    if (samples.length >= limit) break
+  }
+  return samples
 }
 
 function matchCondition(actual: string, expected: unknown) {
diff --git a/apps/backend/src/services/worker-platform/worker-platform-service.test.ts b/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
index 2967c7e1..e55c214e 100644
--- a/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
+++ b/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
@@ -666,6 +666,53 @@ test('拼多多订单忽略模板残留的快手结构化 match_json，按 out_s
   assert.equal(decision.rule?.id, rule.id)
 })
 
+test('拼多多订单可命中来源/平台残留为 91kaquan/kuaishou 的模板名', () => {
+  const rule = buildProductRule({
+    provider: '91kaquan',
+    platform: 'kuaishou',
+    product_name: '安卓怒嚎1钻',
+    match_type: 'contains',
+  })
+  const order = { ...buildOrderRow(), provider: 'pdd', platform: 'pdd' }
+  const item = {
+    ...buildOrderItemRow(),
+    sku_code: '安卓怒嚎1钻',
+    sku_name: '安卓怒嚎1钻',
+    item_snapshot_json: {
+      out_sku_sn: '安卓怒嚎1钻',
+      spec: '安卓区（qv互通）,苏尔南-怒嚎1钻',
+    },
+  }
+
+  const decision = resolveMatchingProductRuleDecision(order, item, [rule], [])
+  assert.equal(decision.reason, 'matched')
+  assert.equal(decision.rule?.id, rule.id)
+})
+
+test('拼多多订单在 sku_code 误填时仍可按 product_name/out_sku_sn 命中', () => {
+  const rule = buildProductRule({
+    provider: '',
+    platform: '',
+    sku_code: '961856378217',
+    product_name: '安卓怒嚎1钻',
+    match_type: 'contains',
+  })
+  const order = { ...buildOrderRow(), provider: 'pdd', platform: 'pdd' }
+  const item = {
+    ...buildOrderItemRow(),
+    sku_code: '安卓怒嚎1钻',
+    sku_name: '安卓怒嚎1钻',
+    item_snapshot_json: {
+      out_sku_sn: '安卓怒嚎1钻',
+      goods_id: '961856378217',
+    },
+  }
+
+  const decision = resolveMatchingProductRuleDecision(order, item, [rule], [])
+  assert.equal(decision.reason, 'matched')
+  assert.equal(decision.rule?.id, rule.id)
+})
+
 test('拼多多订单缺少 out_sku_sn 且 spec 不含规则名时不命中', () => {
   const rule = buildProductRule({
     provider: 'pdd',
diff --git a/apps/frontend/src/pages/admin/panels/ProductMatchPanel.tsx b/apps/frontend/src/pages/admin/panels/ProductMatchPanel.tsx
index dc9d4320..1c936d5d 100644
--- a/apps/frontend/src/pages/admin/panels/ProductMatchPanel.tsx
+++ b/apps/frontend/src/pages/admin/panels/ProductMatchPanel.tsx
@@ -400,8 +400,19 @@ export default function ProductMatchPanel() {
                       </Descriptions.Item>
                     </Descriptions>
                     <JsonPreview
-                      value={{ mappingId: testResult.mappingId, candidates: testResult.candidates }}
+                      value={{
+                        mappingId: testResult.mappingId,
+                        candidates: testResult.candidates,
+                        diagnostics: testResult.diagnostics,
+                      }}
                     />
+                    {testResult.status !== 'matched' &&
+                    testResult.diagnostics?.rejectSamples?.length ? (
+                      <Typography.Paragraph type="secondary" style={{ marginBottom: 0 }}>
+                        相近未命中模板原因见上方 diagnostics.rejectSamples（常见：来源/平台写成
+                        91kaquan/kuaishou、shop_id 绑错店、sku_code 与 out_sku_sn 不一致）。
+                      </Typography.Paragraph>
+                    ) : null}
                   </div>
                 ) : null}
               </div>
diff --git a/apps/frontend/src/services/admin/worker-platform.ts b/apps/frontend/src/services/admin/worker-platform.ts
index 3ed02648..3748f424 100644
--- a/apps/frontend/src/services/admin/worker-platform.ts
+++ b/apps/frontend/src/services/admin/worker-platform.ts
@@ -349,6 +349,26 @@ export function testAdminKuaishouProductMatch(rawPayload: string) {
     mappingId: number | null
     rule: WorkProductRule | null
     candidates: Array<{ ruleKey: string; score: number; mappingId: number | null }>
+    diagnostics?: {
+      outSkuSn: string
+      orderProvider: string
+      orderPlatform: string
+      orderShopId: string
+      contextSellerId: string
+      legacyFallbackEnabled: boolean
+      useLegacyFallback: boolean
+      enabledRules: number
+      enabledMappings: number
+      rejectSamples: Array<{
+        ruleKey: string
+        productName: string
+        provider: string
+        platform: string
+        shopId: string
+        skuCode: string
+        reason: string
+      }>
+    }
   }>('/api/v1/admin/worker-platform/product-match-test', { rawPayload })
 }