Abstract: A dynamic trust model based on independent decisions is built in this paper by analyzing the characteristic of network entities in complex network environment. The paper defines the related concepts of trust, gives a new notion of the homogeneous relation and heterogeneous relation, and takes the direct trust, recommendation trust and self-recommendation trust into account. The time decay factor and weights factor are considered for computing the trust values. In addition, the update algorithm of trust value and the trust decision algorithm are provided in the model. Finally, the experiments are designed to demonstrate the feasibility and credibility of the trust model.