diff --git a/admin/src/api/admin.js b/admin/src/api/admin.js
index c2d2ace..7421be3 100644
--- a/admin/src/api/admin.js
+++ b/admin/src/api/admin.js
@@ -64,10 +64,15 @@ export const deletePage = (id) => request.delete(`/admin/pages/${id}`)
 export const getHomepage = (siteId) => request.get(`/admin/sites/${siteId}/homepage`)
 export const updateHomepage = (siteId, data) => request.put(`/admin/sites/${siteId}/homepage`, data)
 export const downloadHomepage = (siteId) => request.get(`/admin/sites/${siteId}/homepage/download`, { responseType: 'blob' })
+export const getDownloadableAssets = (siteId) => request.get(`/admin/sites/${siteId}/assets/downloadable`)
 
 // 文件管理（功能模块：多级目录、可下载）
-export const getSiteAssets = (siteId, path) =>
-  request.get(`/admin/sites/${siteId}/assets`, { params: path ? { path } : {} })
+export const getSiteAssets = (siteId, path, opts = {}) => {
+  const params = {}
+  if (path) params.path = path
+  if (opts.downloadable) params.downloadable = '1'
+  return request.get(`/admin/sites/${siteId}/assets`, { params })
+}
 export const uploadSiteAsset = (siteId, file, opts = {}) => {
   const form = new FormData()
   form.append('file', file)
diff --git a/admin/src/views/sites/HomepageEdit.vue b/admin/src/views/sites/HomepageEdit.vue
index d946b15..05d2f5d 100644
--- a/admin/src/views/sites/HomepageEdit.vue
+++ b/admin/src/views/sites/HomepageEdit.vue
@@ -43,14 +43,16 @@
           <el-input v-model="form.download_text" placeholder="START EXPLORING" />
         </el-form-item>
         <el-form-item label="按钮链接">
-          <el-input v-model="form.download_url" placeholder="#" />
+          <el-input v-model="form.download_url" placeholder="#" style="flex: 1" />
+          <el-button type="primary" link @click="openFilePicker('download')">选择可下载文件</el-button>
         </el-form-item>
 
         <el-divider content-position="left">平台（轨道）</el-divider>
         <el-form-item label="平台列表">
-          <div v-for="(p, i) in form.platforms" :key="i" style="display: flex; gap: 8px; margin-bottom: 8px">
+          <div v-for="(p, i) in form.platforms" :key="i" style="display: flex; gap: 8px; margin-bottom: 8px; align-items: center">
             <el-input v-model="p.name" placeholder="如 WINDOWS" style="width: 140px" />
             <el-input v-model="p.url" placeholder="链接" style="flex: 1" />
+            <el-button type="primary" link @click="openFilePicker('platform', i)">选择文件</el-button>
             <el-button link type="danger" @click="form.platforms.splice(i, 1)">删除</el-button>
           </div>
           <el-button link type="primary" @click="form.platforms.push({ name: '', url: '#' })">+ 添加平台</el-button>
@@ -84,13 +86,31 @@
 
       <el-empty v-else description="请先选择站点" />
     </el-card>
+
+    <el-dialog v-model="filePickerVisible" title="选择可下载文件" width="640px">
+      <el-table
+        v-loading="fileListLoading"
+        :data="downloadableFiles"
+        highlight-current-row
+        @current-change="onSelectFile"
+      >
+        <el-table-column property="name" label="文件名" min-width="180" />
+        <el-table-column property="file_path" label="路径" min-width="200" show-overflow-tooltip />
+        <el-table-column label="操作" width="100">
+          <template #default="{ row }">
+            <el-button type="primary" link @click="confirmSelectFile(row)">选择</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+      <el-empty v-if="!fileListLoading && downloadableFiles.length === 0" description="暂无可下载文件，请在文件管理中上传并勾选“允许下载”" />
+    </el-dialog>
   </div>
 </template>
 
 <script setup>
 import { ref, reactive, onMounted, watch } from 'vue'
 import { ElMessage } from 'element-plus'
-import { getSites, getOfficialSite, getHomepage, updateHomepage } from '../../api/admin'
+import { getSites, getOfficialSite, getHomepage, updateHomepage, getDownloadableAssets } from '../../api/admin'
 import { useAuthStore } from '../../stores/auth'
 
 const siteId = ref('')
@@ -98,6 +118,10 @@ const sites = ref([])
 const saving = ref(false)
 const downloading = ref(false)
 const formRef = ref(null)
+const filePickerVisible = ref(false)
+const fileListLoading = ref(false)
+const downloadableFiles = ref([])
+const filePickerTarget = ref({ type: 'download' }) // { type: 'download' } | { type: 'platform', index: number }
 
 const defaultForm = () => ({
   logo_text: 'YUHENG ONE',
@@ -203,6 +227,45 @@ const handleDownload = async () => {
   }
 }
 
+function openFilePicker(type, index) {
+  filePickerTarget.value = type === 'platform' ? { type: 'platform', index } : { type: 'download' }
+  filePickerVisible.value = true
+  fetchDownloadableFiles()
+}
+
+async function fetchDownloadableFiles() {
+  if (!siteId.value) return
+  fileListLoading.value = true
+  try {
+    const res = await getDownloadableAssets(siteId.value)
+    downloadableFiles.value = res.list || []
+  } catch (e) {
+    ElMessage.error(e.message)
+    downloadableFiles.value = []
+  } finally {
+    fileListLoading.value = false
+  }
+}
+
+function buildDownloadUrl(asset) {
+  return `/api/web/sites/${siteId.value}/assets/${asset.id}/download`
+}
+
+function confirmSelectFile(asset) {
+  const url = buildDownloadUrl(asset)
+  if (filePickerTarget.value.type === 'download') {
+    form.download_url = url
+  } else {
+    form.platforms[filePickerTarget.value.index].url = url
+  }
+  filePickerVisible.value = false
+  ElMessage.success('已选择：' + asset.name)
+}
+
+function onSelectFile(row) {
+  if (row) confirmSelectFile(row)
+}
+
 onMounted(() => {
   fetchSites().then(() => fetchData())
 })
diff --git a/server/handlers/module_upload.go b/server/handlers/module_upload.go
index 8e3b82d..2ec84b9 100644
--- a/server/handlers/module_upload.go
+++ b/server/handlers/module_upload.go
@@ -32,13 +32,18 @@ func pathPrefix(siteID string) string {
 	return "sites/" + siteID + "/"
 }
 
-// ListSiteAssets 站点功能模块/上传文件列表；query path 为当前目录相对路径（空为根）
+// ListSiteAssets 站点功能模块/上传文件列表；query path 为当前目录相对路径（空为根）；downloadable=1 时返回该站点下所有可下载文件（供首页编辑选择）
 func ListSiteAssets(c *gin.Context) {
 	siteID := c.Param("site_id")
 	if siteID == "" {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "请提供 site_id"})
 		return
 	}
+	onlyDownloadable := c.Query("downloadable") == "1" || c.Query("downloadable") == "true"
+	if onlyDownloadable {
+		listDownloadableAssets(c, siteID)
+		return
+	}
 	path := c.Query("path")
 	prefix := pathPrefix(siteID)
 	if path != "" {
@@ -52,7 +57,6 @@ func ListSiteAssets(c *gin.Context) {
 	defer cancel()
 
 	coll := config.GetDB(config.DBName).Collection("site_assets")
-	// 仅当前目录下直接文件（file_path 为 prefix + 不含 / 的文件名）
 	filter := bson.M{"site_id": siteID, "file_path": bson.M{"$regex": "^" + regexp.QuoteMeta(prefix) + "[^/]+$"}}
 	opts := options.Find().SetSort(bson.D{{Key: "created_at", Value: -1}})
 	cursor, err := coll.Find(ctx, filter, opts)
@@ -68,11 +72,40 @@ func ListSiteAssets(c *gin.Context) {
 		return
 	}
 	total, _ := coll.CountDocuments(ctx, filter)
-	// 子目录列表：从 file_path 中提取当前 path 下的一级子目录名
 	subDirs := listSubDirs(c, siteID, path)
 	c.JSON(http.StatusOK, gin.H{"list": list, "total": total, "sub_dirs": subDirs})
 }
 
+func listDownloadableAssets(c *gin.Context, siteID string) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	coll := config.GetDB(config.DBName).Collection("site_assets")
+	filter := bson.M{"site_id": siteID, "downloadable": true}
+	opts := options.Find().SetSort(bson.D{{Key: "created_at", Value: -1}})
+	cursor, err := coll.Find(ctx, filter, opts)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	defer cursor.Close(ctx)
+	var list []models.SiteAsset
+	if err = cursor.All(ctx, &list); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"list": list, "total": len(list)})
+}
+
+// ListDownloadableAssets 仅返回可下载文件列表（供首页编辑选择，仅需 homepage:edit 权限）
+func ListDownloadableAssets(c *gin.Context) {
+	siteID := c.Param("site_id")
+	if siteID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请提供 site_id"})
+		return
+	}
+	listDownloadableAssets(c, siteID)
+}
+
 func listSubDirs(c *gin.Context, siteID, currentPath string) []string {
 	prefix := pathPrefix(siteID)
 	if currentPath != "" {
@@ -250,3 +283,41 @@ func CreateSiteFolder(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, gin.H{"message": "创建成功", "path": filepath.ToSlash(clean)})
 }
+
+// DownloadSiteAsset 前台公开下载：仅当资源标记为可下载时返回文件（供首页等使用）
+func DownloadSiteAsset(c *gin.Context) {
+	siteID := c.Param("site_id")
+	assetIDStr := c.Param("asset_id")
+	if siteID == "" || assetIDStr == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误"})
+		return
+	}
+	oid, err := bson.ObjectIDFromHex(assetIDStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的ID"})
+		return
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	coll := config.GetDB(config.DBName).Collection("site_assets")
+	var asset models.SiteAsset
+	err = coll.FindOne(ctx, bson.M{"_id": oid, "site_id": siteID}).Decode(&asset)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "资源不存在"})
+		return
+	}
+	if !asset.Downloadable {
+		c.JSON(http.StatusForbidden, gin.H{"error": "该资源不可下载"})
+		return
+	}
+	fullPath := filepath.Join(getUploadDir(), filepath.FromSlash(asset.FilePath))
+	if _, err := os.Stat(fullPath); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "文件不存在"})
+		return
+	}
+	c.Header("Content-Disposition", "attachment; filename=\""+asset.Name+"\"")
+	if asset.ContentType != "" {
+		c.Header("Content-Type", asset.ContentType)
+	}
+	c.File(fullPath)
+}
diff --git a/server/main.go b/server/main.go
index a60c8df..d761432 100644
--- a/server/main.go
+++ b/server/main.go
@@ -161,6 +161,7 @@ func main() {
 		admin.GET("/sites/:site_id/homepage/download", handlers.RequirePermission(models.PermHomepageEdit), handlers.DownloadHomepage)
 		admin.GET("/sites/:site_id/homepage", handlers.RequirePermission(models.PermHomepageEdit), handlers.GetHomepage)
 		admin.PUT("/sites/:site_id/homepage", handlers.RequirePermission(models.PermHomepageEdit), handlers.UpdateHomepage)
+		admin.GET("/sites/:site_id/assets/downloadable", handlers.RequirePermission(models.PermHomepageEdit), handlers.ListDownloadableAssets)
 		admin.GET("/sites/:site_id/assets", handlers.RequirePermission(models.PermSiteManage), handlers.ListSiteAssets)
 		admin.POST("/sites/:site_id/assets", handlers.RequirePermission(models.PermModuleUpload), handlers.UploadSiteAsset)
 		admin.POST("/sites/:site_id/folders", handlers.RequirePermission(models.PermModuleUpload), handlers.CreateSiteFolder)
@@ -212,6 +213,8 @@ func main() {
 		web.GET("/info", func(c *gin.Context) {
 			c.JSON(http.StatusOK, gin.H{"message": "web api"})
 		})
+		// 可下载资源公开下载（首页等链接指向此路径）
+		web.GET("/sites/:site_id/assets/:asset_id/download", handlers.DownloadSiteAsset)
 	}
 
 	port := os.Getenv("PORT")