Built-in short-message sending interface of Android is not very friendly to users and also relatively simple, not supporting sorting, grouping and other functions. On the basis of study on system architecture and component model of Android platform, it uses Eclipse IDE as development environment, creates virtual machine, completes session management which search by content, folder management and management group which sort by date, name, and so on. It well improves short-message sending function of Android mobile. It can be drawn from the result of use that the system interface is simple to operate, stable to run and convenient to use for user.