Abstract: Through the analysis of the running status and questions of cohesive and outreach operation of college think tank alliance based on coconstruction and sharing under no incentive condition，lists the performances and harms of the confusion of college think tank under no incentive conditionThe game theory model is introduced,the strategic choices of members of college think tank alliance is studied,points out the necessity of establishing incentive mechanism in college think tank AllianceAt the same time,Establishing the goals of encouragement for the development of college think tank alliance,the incentive paths for cohesive and outreach operation of college think tank alliance in China based on coconstruction and sharing are pointed.