In order to solve malicious evaluation problems in evaluation model, an improved evaluation model with feedback incentive based on game theory is proposed. The model introduce user's authority into the content-based recommendations model give feedback points with nodes. The model can adjust feedback function dynamically when evaluation. The model with trust evaluation incentive mechanism is established by game theory including one node, a plurality of nodes and a plurality of content. The results showed that evaluation of trust value with authority value would facilitate reasonable choice and the same time, the content trust values increased reasonably.