QQ聊天记录不小心删除后，可以尝试以下方法进行恢复：

1. **通过同步消息记录恢复**。可以在手机的设置里面找到通用，然后找到聊天记录之后点击进入，或者通过聊天记录漫游来恢复记录。在进入聊天记录之后，可以看到第一个功能“同步最近聊天消息至本机”，然后就可以将聊天记录进行恢复了。

2. **通过PC恢复软件进行恢复**。在电脑上找到“互盾苹果恢复大师”这个软件，使用这个软件可以将手机的QQ聊天记录进行恢复。具体操作是将手机连接到电脑上识别手机数据之后打开软件，软件中有两个功能，可以使用【从iPhone设备扫描恢复】对手机里面的数据扫描。扫描完成之后可以看到扫描出来的数据，点击QQ一栏有手机登录过的QQ账号，然后选择删除聊天记录的账号点击查看详情，再找到需要恢复的好友点击查看记录，最后在需要恢复的聊天记录上打勾，点击“导出选中记录”就可以恢复了。

3. **通过文件管理恢复**。登录QQ，点击系统设置选项，再从系统设置中找到“文件管理”选项。一般来说，QQ聊天记录的保存路径是C:\Documents and Settings\Administrator\My Documents\Tencent Files\你的QQ号。找到保存路径后，打开这个路径，选择你QQ号命名的文件夹然后打开它。打开后，查找“Misc.db”，“Msg2.0.db”，“Msg3.0.db”这三个文件，如果没有这三个文件夹，可以去电脑回收站查找，然后把它们还原即可。

需要注意的是，以上方法并不能保证一定能恢复删除的聊天记录，因为这取决于多种因素，例如聊天记录的存储位置、存储时间等等。同时，在进行任何数据恢复操作之前，建议先备份好其他重要的数据，以免发生数据覆盖或数据损坏的情况。

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