Abstract: In order to solve the problem of insufficient coverage of current social networking Web service recommendation algorithm based on user’ trust,this paper incorporated the research ideas of direct trust,indirect trust and community trust, and did a lot of extended research on the calculation about trust.Based on these work,we proposed a new hybrid trust algorithm.We did a lot of experiments based on recall rate,user trust and user dispute.The experimental result shows that the hybrid algorithm has a good performance on coverage problem.Meanwhile,it can solve the problem that single trust algorithm’s sparse data lead to poor recommendation result.

Key words: Social network,User trust,Hybrid recommendation algorithm,ModelTrust