对等网的高度动态性、异构性、关联度低等特性,要求对等网中的节点之间要高度合作.与采用激励机制促进节点之间进行合作的方法不同,本文引入强互惠理论,解决对等网络中存在的节点不合作问题,即对等网络中存在的强互惠节点,为了公平,愿意自己承担成本来惩罚不合作节点.在理论上对系统中节点的行为演化过程进行了分析,仿真实验结果显示系统中不合作节点比例降低,且提高了系统的整体收益. Peer-to-peer networks are highly dynamic, heterogeneous, and low-relational, requiring high cooperation among nodes in the peer-to-peer network.Compared with the method of using incentive mechanism to promote cooperation between nodes, this paper introduces the theory of strong reciprocity To solve the problem of node noncooperation existing in peer-to-peer networks, that is, the peer nodes with strong reciprocity exist in peer-to-peer networks and are willing to bear the cost to punish non-cooperative nodes for fairness.In theory, the evolution of nodes in the system is carried out Analysis and simulation results show that the proportion of uncooperative nodes in the system is reduced, and the overall revenue of the system is increased.