diff --git a/apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts b/apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts
index 98bb0840f..5c1220f4c 100755
--- a/apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts
+++ b/apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts
@@ -1,75 +1,75 @@
-import { useState, useCallback, useMemo } from "react"
+import { useState, useCallback } from "react"
 import { message } from "antd"
 import type { AssetItem } from "@/api/assets"
-import { SMART_MATCH_REASONS } from "../../constants"
-
-interface SmartMatchedResult {
-  asset: AssetItem
-  matchScore: number
-  matchReason: string
-}
+import { smartMatchAssets, getAssets } from "@/api/assets"
 
 interface UseSmartMatchOptions {
+  libraryId: string
   materials: { items: AssetItem[]; total: number }
   smartSelectedIds: string[]
   onSmartSelectedIdsChange: (ids: string[]) => void
 }
 
 /**
- * 智能素材匹配 Hook
- * 封装 AI 匹配、换一批、全选/清空等逻辑
+ * 智能素材匹配 Hook（Q5 简化版）
+ * 用户不手动选素材时，一键调用后端 AI 选素材
+ * 后端统一选素材逻辑后续完善，当前先走前端流程简化
  */
 export function useSmartMatch({
+  libraryId,
   materials,
   smartSelectedIds,
   onSmartSelectedIdsChange,
 }: UseSmartMatchOptions) {
-  const [smartMatchInput, setSmartMatchInput] = useState("")
   const [smartMatching, setSmartMatching] = useState(false)
-  const [smartMatchedResults, setSmartMatchedResults] = useState<SmartMatchedResult[]>([])
   const [hasMatched, setHasMatched] = useState(false)
 
-  /* ── 智能素材匹配 ── */
+  /* ── 一键智能匹配 ── */
   const handleSmartMatch = useCallback(async () => {
-    if (!smartMatchInput.trim()) {
-      message.warning("请先输入视频内容描述")
-      return
-    }
     if (materials.items.length === 0) {
       message.warning("当前视频库暂无素材")
       return
     }
 
     setSmartMatching(true)
-    setHasMatched(true)
 
-    // 模拟 AI 匹配延迟
-    await new Promise((resolve) => setTimeout(resolve, 1500))
+    try {
+      // 调用后端智能匹配 API
+      const result = await smartMatchAssets(libraryId)
+      const matchedIds = result.items.map((a: AssetItem) => a.id)
 
-    // 从素材库中随机选取 5-8 个作为推荐结果
-    const shuffled = [...materials.items].sort(() => Math.random() - 0.5)
-    const count = Math.min(shuffled.length, 5 + Math.floor(Math.random() * 4))
-    const picked = shuffled.slice(0, count)
+      if (matchedIds.length > 0) {
+        onSmartSelectedIdsChange(matchedIds)
+        setHasMatched(true)
+        message.success(`AI 已为你选择 ${matchedIds.length} 个素材`)
+      } else {
+        // 后端返回空结果，回退到全选
+        onSmartSelectedIdsChange(materials.items.map((a) => a.id))
+        setHasMatched(true)
+        message.info("AI 暂未找到匹配素材，已全选当前库素材")
+      }
+    } catch {
+      // 后端 API 尚未就绪时，回退到全选当前库素材
+      onSmartSelectedIdsChange(materials.items.map((a) => a.id))
+      setHasMatched(true)
+      message.info("已为你全选当前库素材（智能匹配功能即将上线）")
+    } finally {
+      setSmartMatching(false)
+    }
+  }, [libraryId, materials.items, onSmartSelectedIdsChange])
 
-    const results = picked.map((asset, idx) => ({
-      asset,
-      matchScore: Math.round(85 + Math.random() * 14), // 85-99 分
-      matchReason:
-        SMART_MATCH_REASONS[idx % SMART_MATCH_REASONS.length] +
-        (Math.random() > 0.5 ? "，画面质感优秀" : ""),
-    }))
+  const handleRefreshMatch = useCallback(async () => {
+    // 换一批 = 重新触发智能匹配
+    await handleSmartMatch()
+  }, [handleSmartMatch])
 
-    // 按匹配度从高到低排序
-    results.sort((a, b) => b.matchScore - a.matchScore)
+  const handleSelectAllMatched = useCallback(() => {
+    onSmartSelectedIdsChange(materials.items.map((a) => a.id))
+  }, [materials.items, onSmartSelectedIdsChange])
 
-    setSmartMatchedResults(results)
-    // 默认选中匹配度 >= 90 的素材
-    const defaultSelected = results.filter((r) => r.matchScore >= 90).map((r) => r.asset.id)
-    onSmartSelectedIdsChange(
-      defaultSelected.length > 0 ? defaultSelected : results.slice(0, 3).map((r) => r.asset.id),
-    )
-    setSmartMatching(false)
-  }, [smartMatchInput, materials.items, onSmartSelectedIdsChange])
+  const handleClearSmartSelect = useCallback(() => {
+    onSmartSelectedIdsChange([])
+  }, [onSmartSelectedIdsChange])
 
   const handleToggleSmartSelect = useCallback(
     (assetId: string) => {
@@ -82,55 +82,13 @@ export function useSmartMatch({
     [smartSelectedIds, onSmartSelectedIdsChange],
   )
 
-  const handleRefreshMatch = useCallback(async () => {
-    if (materials.items.length <= 5) {
-      message.info("视频库素材较少，无法换一批")
-      return
-    }
-    setSmartMatching(true)
-    await new Promise((resolve) => setTimeout(resolve, 800))
-
-    const remaining = materials.items.filter(
-      (m) => !smartMatchedResults.some((r) => r.asset.id === m.id),
-    )
-    const shuffled = [...remaining].sort(() => Math.random() - 0.5)
-    const count = Math.min(shuffled.length, 5 + Math.floor(Math.random() * 3))
-    const picked = shuffled.slice(0, count)
-
-    const results = picked.map((asset, idx) => ({
-      asset,
-      matchScore: Math.round(80 + Math.random() * 19),
-      matchReason:
-        SMART_MATCH_REASONS[(idx + 2) % SMART_MATCH_REASONS.length] +
-        (Math.random() > 0.5 ? "，节奏明快" : ""),
-    }))
-    results.sort((a, b) => b.matchScore - a.matchScore)
-
-    setSmartMatchedResults(results)
-    onSmartSelectedIdsChange([])
-    setSmartMatching(false)
-  }, [materials.items, smartMatchedResults, onSmartSelectedIdsChange])
-
-  const handleSelectAllMatched = useCallback(() => {
-    onSmartSelectedIdsChange(smartMatchedResults.map((r) => r.asset.id))
-  }, [smartMatchedResults, onSmartSelectedIdsChange])
-
-  const handleClearSmartSelect = useCallback(() => {
-    onSmartSelectedIdsChange([])
-  }, [onSmartSelectedIdsChange])
-
-  /* ── 计算已选智能匹配素材的总时长 ── */
-  const smartSelectedTotalDuration = useMemo(() => {
-    return smartMatchedResults
-      .filter((r) => smartSelectedIds.includes(r.asset.id))
-      .reduce((sum, r) => sum + (r.asset.duration || 0), 0)
-  }, [smartMatchedResults, smartSelectedIds])
+  /* ── 计算已选素材总时长 ── */
+  const smartSelectedTotalDuration = materials.items
+    .filter((a) => smartSelectedIds.includes(a.id))
+    .reduce((sum, a) => sum + (a.duration || 0), 0)
 
   return {
-    smartMatchInput,
-    setSmartMatchInput,
     smartMatching,
-    smartMatchedResults,
     hasMatched,
     smartSelectedIds,
     handleSmartMatch,
@@ -141,3 +99,4 @@ export function useSmartMatch({
     smartSelectedTotalDuration,
   }
 }
+