diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index e1a0ebd..a57d856 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -36,6 +36,17 @@ const isAllPreviewSelected = computed(() => {
   return previewIds.every(id => selectedIds.has(id))
 })
 
+const isAllFavoriteSelected = computed(() => {
+  const favoriteIds = fontStore.favoriteFonts.map(font => font.id)
+  if (favoriteIds.length === 0) {
+    return false
+  }
+
+  return favoriteIds.every(id => fontStore.previewFontIds.has(id))
+})
+
+const favoriteFontCount = computed(() => fontStore.favoriteFonts.length)
+
 // 加载字体列表
 try {
   useFontLoader()
@@ -186,6 +197,20 @@ function handleTogglePreviewSelectAll() {
   svgPreviewRef.value?.toggleSelectAllPreviewItems()
 }
 
+function handleToggleFavoriteSelectAll() {
+  const favoriteIds = fontStore.favoriteFonts.map(font => font.id)
+  if (favoriteIds.length === 0) {
+    return
+  }
+
+  if (isAllFavoriteSelected.value) {
+    favoriteIds.forEach(id => fontStore.removeFromPreview(id))
+    return
+  }
+
+  favoriteIds.forEach(id => fontStore.addToPreview(id))
+}
+
 console.log('App.vue: script setup completed')
 </script>
 
@@ -304,7 +329,22 @@ console.log('App.vue: script setup completed')
 
         <!-- Frame 5: 已收藏字体 - 弹性高度 -->
         <div class="border border-solid border-[#f7e0e0] rounded-lg p-1.5 flex flex-col gap-2 flex-1 overflow-hidden min-h-[120px]">
-          <h2 class="text-base text-black shrink-0 leading-none">已收藏字体</h2>
+          <div class="flex items-center pr-[9px]">
+            <h2 class="text-base text-black shrink-0 leading-none flex-1">
+              已收藏字体（{{ favoriteFontCount }}字体）
+            </h2>
+            <button
+              @click="handleToggleFavoriteSelectAll"
+              class="w-4 h-4 shrink-0 p-0 border-0 bg-transparent cursor-pointer hover:opacity-85 transition-opacity"
+              title="已收藏字体全选/全不选"
+            >
+              <img
+                :src="isAllFavoriteSelected ? unselectAllIcon : selectAllIcon"
+                alt="已收藏字体全选/全不选"
+                class="w-full h-full"
+              />
+            </button>
+          </div>
           <div v-overflow-aware class="scrollbar-hover flex-1 overflow-y-auto overflow-x-hidden pr-2">
             <FavoritesList />
           </div>
diff --git a/frontend/src/components/FontTree.vue b/frontend/src/components/FontTree.vue
index 12cf3bb..26be29c 100644
--- a/frontend/src/components/FontTree.vue
+++ b/frontend/src/components/FontTree.vue
@@ -48,6 +48,10 @@ function getCategoryFontIds(node: FontTreeNode): string[] {
     .map(child => child.fontInfo.id)
 }
 
+function getCategoryFontCount(node: FontTreeNode): number {
+  return getCategoryFontIds(node).length
+}
+
 function isCategoryAllInPreview(node: FontTreeNode): boolean {
   const ids = getCategoryFontIds(node)
   return ids.length > 0 && ids.every(id => fontStore.previewFontIds.has(id))
@@ -101,7 +105,7 @@ function handleCategorySelectAll(node: FontTreeNode, event: Event) {
             @click="toggleExpand(node)"
             class="text-base font-medium text-black cursor-pointer flex-1 ml-2"
           >
-            {{ node.name }}
+            {{ node.name }}（{{ getCategoryFontCount(node) }}字体）
           </div>
 
           <div class="flex items-center gap-2 shrink-0 mr-[1px]">