In the dynamic model,the numbers of nodes in network increase over time,and network maintain the small-world features.Due to the P2P network is a dynamic network,static model does not apply to P2P network structure,but dynamic model have some limitations that they do not adjust the different network features according to requirement.The paper presented a new dynamic structure method of small-world P2P network,which could use structure parameter to adjust the average degree,cluster coefficient and average path length of network.Simulation results show that,with the network scale expansion the network maintain small-world features,and structural parameters can effectively regulate the small world network features.