Abstract. In order to solve security problems such as user privacy information revealed after mobile phone lost, based on Android broadcast mechanism and backstage service technology, improved data storage way and self-startup mode of original mobile phone security software, added SMS encryption、 message broadcast priority interception and sandbox breakthrough technology, a mobile phone antitheft tracking system with remote SMS management function was designed and implemented. The software not only owned basic anti-theft function of automatically remove sensitive information to protect user privacy security after mobile phone lost, but also silently monitored、GPS positioned for lost phone and got the latest contacts to track stolen phone. Real machine and simulator two experimental results show that the system is running well, can achieve desired design requirements.