With rapid development of the Internet , network and network applications cover widely. Besides, network services and network requests increase constantly, so how to effectively use the limited computer resources, providing the largest network service is a problem worth exploring.Peer to peer networks can be used as a means to solve this problem,but there are some limitations in the development and use of P2P network .The peer to peer platform is relatively independent and data can not be shared directly. In addition,the mobility of the mobile nodes leads to the instability of the network.On the basis of previous study,the paper proposes a lightweight P2P protocol framework ,which is connected with different platforms through JXTA protocol . At the same time ,the JXTA framework is simplified,making it a lightweight framework for dealing with mobile node .