The invention discloses a personal information security management system for a mobile phone. The personal information security management system comprises a central processor, a deleting zero-cleaning module and a cracked alarm device, wherein the central processor is arranged inside the mobile phone and is connected with a judging encryption module through a data wire, and the other end of the judging encryption module is connected with components inside the mobile phone; one end of the central processor is electrically connected with a password identification module, and the other end of the central processor is electrically connected with an application software management module, a personal information management module and a private file management module. According to the system, the encryption conditions of files inside the mobile phone can be judged through the judging encryption module, and the encrypted files are specially treated; when the encrypted files inside the mobile phone are cracked by other people, cloud backup can be carried out on the files inside the mobile phone, and information inside the mobile phone is deleted and completely cleared after the cloud backup is completed, the information is prevented from being stolen by other people, the information is sent into a specific card of an owner, and current relevant information of the mobile phone is alarmed.