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With the development of the computer network, assets evaluation has been widely used, which makes the network node trust issues become increasingly prominent. With reference to the sociology interpersonal trust model and based on the relationships and interpersonal entropy, this paper designed the credibility method under the dispersion assets evaluation environment, which reflects the dynamic nature of continuity and uncertainty clearly. The model obtains the asset appraisal reliability directly from the history mutual information, and revise the asset appraisal reliability according to the credit records with each node and credibility functions directly, and then consider the revised credibility information of each node comprehensively, using B constraint synthesis to calculate the comprehensive reliability assets appraisal, then make use of the simulation analysis of the new model to evaluate the effect of assets evaluation credibility and discuss the future work in the end. [ABSTRACT FROM AUTHOR]