With the development of theme parks,which represents a multi-million-pound industry worldwide,research on the assimilation of theme parks becomes more and more important.The conversion behavior of visitors to theme parks becomes more frequent and the managers will lose many chances if they have no idea on which factor will influence such behavior.So it is necessary to find the deep reasons and influences cause the tourists conversion behavior,to keep the customer and improve customer loyalty in the fierce competition,the operator should monitor these factors better.The paper analyse the factors that cause tourists switch brands based on the perception theory,and find the key factors,the paper puts forward suggestions and advices that improving visitors' loyalty according to the results.