diff --git a/README.md b/README.md
index 87234a606..5cb6c8279 100644
--- a/README.md
+++ b/README.md
@@ -95,7 +95,7 @@
 - [x] 合集图片
 - [x] 删除/置顶/撤回私信
 - [x] 举报用户/评论/视频/动态
-- [x] 删除/发布文本/图片动态
+- [x] 删除/发布/置顶文本/图片动态
 - [x] 其他
 
 ## opt
diff --git a/lib/main.dart b/lib/main.dart
index 651c31bc0..549cfb949 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -31,8 +31,16 @@ void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   MediaKit.ensureInitialized();
   await GStorage.init();
-  if (GStorage.setting.get(SettingBoxKey.autoClearCache, defaultValue: true)) {
+  if (GStorage.setting.get(SettingBoxKey.autoClearCache, defaultValue: false)) {
     await CacheManage.clearLibraryCache();
+  } else {
+    final num maxCacheSize = GStorage.maxCacheSize;
+    if (maxCacheSize != 0) {
+      final double currCache = await CacheManage().loadApplicationCache();
+      if (currCache >= maxCacheSize) {
+        await CacheManage.clearLibraryCache();
+      }
+    }
   }
   if (GStorage.setting
       .get(SettingBoxKey.horizontalScreen, defaultValue: false)) {
diff --git a/lib/pages/about/view.dart b/lib/pages/about/view.dart
index e7d601929..a425c8574 100644
--- a/lib/pages/about/view.dart
+++ b/lib/pages/about/view.dart
@@ -46,7 +46,8 @@ class _AboutPageState extends State<AboutPage> {
   }
 
   Future getCacheSize() async {
-    cacheSize.value = await CacheManage().loadApplicationCache();
+    cacheSize.value =
+        CacheManage.formatSize(await CacheManage().loadApplicationCache());
   }
 
   Future getCurrentApp() async {
diff --git a/lib/pages/setting/widgets/model.dart b/lib/pages/setting/widgets/model.dart
index 1e4a996b3..a81fddb90 100644
--- a/lib/pages/setting/widgets/model.dart
+++ b/lib/pages/setting/widgets/model.dart
@@ -35,6 +35,7 @@ import 'package:PiliPlus/plugin/pl_player/models/bottom_progress_behavior.dart';
 import 'package:PiliPlus/plugin/pl_player/models/fullscreen_mode.dart';
 import 'package:PiliPlus/plugin/pl_player/utils/fullscreen.dart';
 import 'package:PiliPlus/utils/accounts/account_manager/account_mgr.dart';
+import 'package:PiliPlus/utils/cache_manage.dart';
 import 'package:PiliPlus/utils/extension.dart';
 import 'package:PiliPlus/utils/feed_back.dart';
 import 'package:PiliPlus/utils/global_data.dart';
@@ -2464,7 +2465,56 @@ List<SettingsModel> get extraSettings => [
         subtitle: '每次启动时清除缓存',
         leading: const Icon(Icons.auto_delete_outlined),
         setKey: SettingBoxKey.autoClearCache,
-        defaultVal: true,
+        defaultVal: false,
+      ),
+      SettingsModel(
+        settingsType: SettingsType.normal,
+        title: '最大缓存大小',
+        getSubtitle: () {
+          final num = GStorage.maxCacheSize;
+          return '当前最大缓存大小: 「${num == 0 ? '无限' : CacheManage.formatSize(GStorage.maxCacheSize)}」';
+        },
+        onTap: (setState) {
+          showDialog(
+            context: Get.context!,
+            builder: (context) {
+              String valueStr = '';
+              return AlertDialog(
+                title: const Text('最大缓存大小'),
+                content: TextField(
+                  autofocus: true,
+                  onChanged: (value) => valueStr = value,
+                  keyboardType: TextInputType.number,
+                  inputFormatters: [
+                    FilteringTextInputFormatter.allow(RegExp(r'[\d\.]+')),
+                  ],
+                  decoration: InputDecoration(suffixText: 'MB'),
+                ),
+                actions: [
+                  TextButton(
+                    onPressed: Get.back,
+                    child: Text(
+                      '取消',
+                      style: TextStyle(
+                          color: Theme.of(context).colorScheme.outline),
+                    ),
+                  ),
+                  TextButton(
+                    onPressed: () async {
+                      Get.back();
+                      num value = num.tryParse(valueStr) ?? 0;
+                      await GStorage.setting
+                          .put(SettingBoxKey.maxCacheSize, value * 1024 * 1024);
+                      setState();
+                    },
+                    child: const Text('确定'),
+                  ),
+                ],
+              );
+            },
+          );
+        },
+        leading: const Icon(Icons.delete_outlined),
       ),
       SettingsModel(
         settingsType: SettingsType.sw1tch,
diff --git a/lib/utils/cache_manage.dart b/lib/utils/cache_manage.dart
index 75c932dbf..5de201fb6 100644
--- a/lib/utils/cache_manage.dart
+++ b/lib/utils/cache_manage.dart
@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:io';
+import 'package:PiliPlus/utils/extension.dart';
 import 'package:path_provider/path_provider.dart';
 
 class CacheManage {
@@ -10,7 +11,7 @@ class CacheManage {
   factory CacheManage() => cacheManage;
 
   // 获取缓存目录
-  Future<String> loadApplicationCache() async {
+  Future<double> loadApplicationCache() async {
     /// clear all of image in memory
     // clearMemoryImageCache();
     /// get ImageCache
@@ -41,7 +42,7 @@ class CacheManage {
       cacheSize += value;
     }
 
-    return formatSize(cacheSize);
+    return cacheSize;
   }
 
   // 循环计算文件的大小（递归）
@@ -62,15 +63,15 @@ class CacheManage {
   }
 
   // 缓存大小格式转换
-  static String formatSize(double value) {
-    List<String> unitArr = ['B', 'K', 'M', 'G'];
+  static String formatSize(num value) {
+    List<String> unitArr = const ['B', 'K', 'M', 'G', 'T', 'P'];
     int index = 0;
-    while (value > 1024) {
+    while (value >= 1024) {
       index++;
       value = value / 1024;
     }
     String size = value.toStringAsFixed(2);
-    return size + unitArr[index];
+    return size + unitArr.getOrElse(index, orElse: () => '');
   }
 
   /// 清除 Documents 目录下的 DioCache.db
diff --git a/lib/utils/extension.dart b/lib/utils/extension.dart
index 86d5882e8..6a634a1bb 100644
--- a/lib/utils/extension.dart
+++ b/lib/utils/extension.dart
@@ -45,6 +45,10 @@ extension ListExt<T> on List<T>? {
     return this![index];
   }
 
+  T getOrElse(int index, {required T Function() orElse}) {
+    return getOrNull(index) ?? orElse();
+  }
+
   bool eq(List<T>? other) {
     if (this == null) {
       return other == null;
diff --git a/lib/utils/storage.dart b/lib/utils/storage.dart
index bb51dd201..1c26481a6 100644
--- a/lib/utils/storage.dart
+++ b/lib/utils/storage.dart
@@ -468,6 +468,9 @@ class GStorage {
       SettingBoxKey.pageTransition,
       defaultValue: Transition.native.index)];
 
+  static num get maxCacheSize => GStorage.setting
+      .get(SettingBoxKey.maxCacheSize, defaultValue: pow(1024, 3));
+
   static List<double> get dynamicDetailRatio => List<double>.from(setting
       .get(SettingBoxKey.dynamicDetailRatio, defaultValue: [60.0, 40.0]));
 
@@ -669,6 +672,7 @@ class SettingBoxKey {
       /// 其他
       autoUpdate = 'autoUpdate',
       autoClearCache = 'autoClearCache',
+      maxCacheSize = 'maxCacheSize',
       defaultShowComment = 'defaultShowComment',
       replySortType = 'replySortType',
       defaultDynamicType = 'defaultDynamicType',