diff --git a/src/main/java/top/focess/qq/core/bot/mirai/MiraiBotManager.java b/src/main/java/top/focess/qq/core/bot/mirai/MiraiBotManager.java
index 93b8e16..841224a 100644
--- a/src/main/java/top/focess/qq/core/bot/mirai/MiraiBotManager.java
+++ b/src/main/java/top/focess/qq/core/bot/mirai/MiraiBotManager.java
@@ -396,6 +396,13 @@ private void setup(final MiraiBot b, final net.mamoe.mirai.Bot bot) {
                 FocessQQ.getLogger().thrLang("exception-submit-member-card-change-event", ex);
             }
         }));
+        listeners.add(bot.getEventChannel().subscribeAlways(BotOfflineEvent.class, event -> {
+            try {
+                bot.login();
+            } catch (Exception e) {
+                FocessQQ.getLogger().thrLang("exception-bot-accidentally-offline", e);
+            }
+        }));
         BOT_LISTENER_MAP.put(b, listeners);
     }
 
diff --git a/src/main/resources/lang.yml b/src/main/resources/lang.yml
index f5c2b68..0aa78a6 100644
--- a/src/main/resources/lang.yml
+++ b/src/main/resources/lang.yml
@@ -81,6 +81,7 @@ exception-get-null-caller-class: Get null caller class exception
 exception-load-plugin-unexpected-exception: Load plugin with unexpected exception
 exception-enable-plugin: Enable plugin exception
 exception-disable-plugin: Disable plugin exception
+exception-bot-accidentally-offline: Bot accidentally offline exception
 setup-uncaught-exception-handler: Setup uncaught exception handler
 setup-shutdown-hook: Setup shutdown hook
 start-console-input-thread: Start console input thread
diff --git a/src/test/java/top/focess/qq/test/environment/TestBot.java b/src/test/java/top/focess/qq/test/environment/TestBot.java
index e5a50d5..bbb27f2 100644
--- a/src/test/java/top/focess/qq/test/environment/TestBot.java
+++ b/src/test/java/top/focess/qq/test/environment/TestBot.java
@@ -6,7 +6,6 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.jetbrains.annotations.UnmodifiableView;
 import top.focess.qq.FocessQQ;
-import top.focess.qq.api.bot.BotLoginException;
 import top.focess.qq.api.bot.BotProtocol;
 import top.focess.qq.api.bot.contact.*;
 import top.focess.qq.api.bot.message.Audio;
@@ -45,7 +44,7 @@ public TestBot(long id, String password, Plugin plugin, BotProtocol botProtocol,
     }
 
     @Override
-    public boolean relogin() throws BotLoginException {
+    public boolean relogin() {
         boolean ret = this.logout() && this.login();
         try {
             EventManager.submit(new BotReloginEvent(this));