随着安卓手机的发展，数据删除已经成为人们保护隐私数据的重要手段，但是安卓手机自带的数据删除是不安全的。自带的数据删除是为了回收存储空间所作的一个快速操作，其操作只是将元数据和文件内容的连接阻断，同时把元数据标识成删除标记，但是它清除的文件还是保存在存储介质内，黑客仍然可以通过相应的数据恢复技术将数据还原，从而导致用户的隐私数据泄露。本文就现阶段的数据删除技术进行深度剖析，设计出一种基于双文件系统存储方式的数据安全删除方案。该方案与之前研究人员的安全删除方案进行多项指标对比分析。发现该方案整体优于之前研究人员的方案，方案评估表明该方案符合安全删除的高效性与可行性。 With the development of Android phones, data deletion has become an important means for people to protect private data, but the data deletion that comes with Android phones is not safe. The built-in data deletion is a quick operation for reclaiming storage space. The operation is only to block the connection between metadata and file content, and at the same time, mark the metadata as a deletion mark, but the files it clears are still stored in the storage medium. Hackers can still restore the data through the corresponding data recovery technology, resulting in the leakage of the user’s private data. This article conducts an indepth analysis of the current data deletion technology, and designs a data security deletion scheme based on the dual-file system storage method. This program compares and analyzes multiple indicators with the previous researcher’s secure deletion program. It was found that the program was better than the previous researcher’s program as a whole, and the evaluation of the program showed that the program meets the efficiency and feasibility of safe deletion.