Abstract: With the development of the distributed network，more and more applications need to establish the trust，especially among the stranger entity，due to the complicated environment of the share resource.Because the share system is open，dynamic and uncertain，so it is difficult for the nodes to master all the security information，which leads to the undependability and security threat.So far，some of the trust model has been given，but they still have some limitations.Some model don’t distinguish trusted-evidence from the no trusted-evidence，it may cause the cheating from the malice node； Some model only update node’s trust and ignore updating of the recommendation-node’s trust which not only don’t punish the cheating of the recommender but also don’t encourage the recommendation.So how to get a comprehensive computation of the trust，which embodies the characteristic of the trust，still is an important thing to research.Comprehensive methods of trust computation，such as updating of the evidence and recommender’s trust，direct trust computation and recommendation trust computation，are discussed.Also the authors discuss the trust recommendation structure such as sequent，parallel，sequent-parallel and network structure.The trust evaluation in this paper，which can keep down the cheating and reflects the trust characteristic such as subjectivity，dynamic，no- transitivity and so on，is practical and scalable.The authors also give a new notion of the homogeneous recommender and heterogeneous recommender，by distinguishing the two kinds of the recommendation，can get more accurate trust evaluation.