Peer-to-peer (P2P) structure is widely applied in multimedia streaming applications to support large number of clients spread all over the Internet. For real-time streaming applications, data arrival time is critical. In this paper, we design a scheduling scheme to manipulate the order of data transmission between peers in order to improve the transmission efficiency in P2P streaming. Simulation results show that our scheme improves average data arrival time and increases the rate of data arriving on time in dynamic fluctuating network.