针对在线社会网络中用户间的复杂关联和信任问题,本文提出一种链式优化方法来降低用户关联的复杂性,同时结合多维度用户评价、时间衰减、共谋识别以及目标用户信誉值几方面综合计算目标用户的动态信任值,建立了在线社会网络优化及信任计算算法,有效地解决了在线社会网络的信任计算问题. Aiming at the problem of complex association and trust between users in online social network, this paper proposes a chain optimization method to reduce the complexity of user association. At the same time, combining with multi-dimensional user evaluation, time decay, collusion identification and target user reputation By comprehensively calculating the dynamic trust value of the target user, an online social network optimization and trust calculation algorithm is established, which effectively solves the problem of trust calculation in online social networks.