The advent of 3G network and popularity of intelligent phones has brought about great changes in mobile media applications. Through the study of rich media technology, the paper aims at discussing the application of rich media on iOS social platform---Shenyang mobile phone radio system. We use audio queue services and thread queue services and caching policy to optimize the transmission and presentation mechanisms of the rich media resource. At present, the mobile phone radio system has passed testing and launched on the app store. As experiments and practice show, the design scheme can meet the user's mobile social needs in terms of performance and user experience.