diff --git a/src/utils/image/imageCacheManager.js b/src/utils/image/imageCacheManager.js
index 3f839b5..9bf6569 100644
--- a/src/utils/image/imageCacheManager.js
+++ b/src/utils/image/imageCacheManager.js
@@ -1,5 +1,6 @@
 // src/utils/imageCacheManager.js
 import { IMAGE_CACHE_VERSION } from '@/config/imageCacheVersion'
+import { useDebounce } from '@/utils/useDebounce'
 
 class ImageCacheManager {
   constructor() {
@@ -20,6 +21,9 @@ class ImageCacheManager {
     this.pendingRequests = new Map() // 底层请求管理：包含重试次数 { url: { promise, retries } }
     this.maxRetries = 3 // 最大重试次数
 
+    // ✅ 新增：防抖版本的缓存限制检查（1 秒防抖，合并多次调用）
+    this.enforceCacheLimitsDebounced = useDebounce(this.enforceCacheLimits.bind(this), 1000, false)
+
     this.init()
   }
 
@@ -170,8 +174,11 @@ class ImageCacheManager {
         try {
           const response = await cache.match(key)
           if (response) {
-            const blob = await response.blob()
-            cacheEntries.push({ key, size: blob.size, response })
+            // ✅ 优化：优先使用 Content-Length 头，避免 blob() 开销
+            const contentLength = response.headers.get('content-length')
+            // 使用与添加时相同的兜底逻辑
+            const size = contentLength ? parseInt(contentLength, 10) : (await response.blob()).size // 兜底方案
+            cacheEntries.push({ key, size, response })
           }
         } catch (e) {
           console.warn('无法获取缓存项大小:', key.url)
@@ -207,7 +214,8 @@ class ImageCacheManager {
         if (response) {
           const contentLength = response.headers.get('content-length')
           if (contentLength) {
-            const size = parseInt(contentLength, 10)
+            // 使用与添加时相同的逻辑
+            const size = contentLength ? parseInt(contentLength, 10) : (await response.blob()).size // 兜底
             this._updateCacheSize(cacheName, -size) // 减少缓存大小
           }
         }
@@ -231,6 +239,7 @@ class ImageCacheManager {
 
       console.log('正在清除旧的OSS图片缓存:', oldImageCaches)
       await Promise.all(oldImageCaches.map((name) => caches.delete(name)))
+      this.currentImageCacheSize = 0 // 重置计数器
     } catch (error) {
       console.warn('清理旧的OSS图片缓存失败:', error)
     }
@@ -249,6 +258,7 @@ class ImageCacheManager {
 
       console.log('正在清除旧的本地assets缓存:', oldAssetCaches)
       await Promise.all(oldAssetCaches.map((name) => caches.delete(name)))
+      this.currentAssetCacheSize = 0 // 重置计数器
     } catch (error) {
       console.warn('清理旧的本地assets缓存失败:', error)
     }
@@ -266,6 +276,9 @@ class ImageCacheManager {
 
       console.log('正在清除所有图片缓存:', allCaches)
       await Promise.all(allCaches.map((name) => caches.delete(name)))
+      // 重置计数器
+      this.currentImageCacheSize = 0
+      this.currentAssetCacheSize = 0
     } catch (error) {
       console.warn('清理所有图片缓存失败:', error)
     }
@@ -451,7 +464,8 @@ class ImageCacheManager {
           }
 
           // 异步检查缓存限制
-          this.enforceCacheLimits(cache, cacheName).catch((error) => {
+          // ✅ 修复：包装为 Promise 确保错误捕获
+          Promise.resolve(this.enforceCacheLimitsDebounced(cache, cacheName)).catch((error) => {
             console.warn('检查缓存限制时出错:', error)
           })
         }