The rapid development of fintech impacts the traditional financial business model and challenges the current regulatory system.Financial risks in the era of fintech need effective financial regulation to prevent and resolve，and relevant financial consumer protection also needs strong fintech regulation to realize.The mode of regulatorysandbox is conducive to balance the innovative development and risk prevention of fintech.Since the UK put forward this mode，countries such as Australia and Singapore began to apply the regulatorysandbox in fintechregulationand promote the development of fintech and regulatory technology.We should draw on the successful experience of regulatorysandbox，give full play to the advantages of reducing the cost of regulatory sandbox in specific application，clearly define the application scope of regulatory sandbox，establish a complete sandbox exit mechanism and docking mechanism，and pay attention to regional and international cooperation.