Based on the perspective of innovation ecosystem participants,this study uses multiple regression models to investigate the impact mechanism of platform enterprise led innovation ecosystem governance mechanisms(contract governance and relationship gov-ernance)on ecological participants'cooperative behavior,and further discusses the regulating effect of technology volatility on the gov-ernance mechanisms of ecological participants'cooperative behavior.The results show that both contract binding force and relationship governance have a positive impact on the cooperative behavior of ecological participants,and contract inclusiveness has a negative im-pact on ecological participants;relationship governance strengthens the role of contract binding force in promoting the cooperative be-havior of ecological participants,but does not change the impact of contract inclusiveness on the cooperative behavior of ecological par-ticipants;technology fluctuation can strengthen the effect of contract governance on the cooperative behavior of ecological participants,but it cannot significantly affect the effect of relationship governance and cooperative behavior of ecological participants.