Abstract:Digital platform is the most important form of organization in the digital era. How to clarify the boundary between platform autonomy and government regulation so as to exert the order maintenance function of platforms effectively is the key issue in the region of the digital economy governance. This study firstly introduces the basic model of platform autonomy and the regulatory challenges it faces, basing on the background of the emergence of digital platform autonomy. Secondly, through a comparative analysis of the regulatory theories and legal policies of the digital platform autonomy in the European Union and the United States, this study summarizes the advantages and disadvantages of different models. Finally, aiming at the fuzzy boundary of digital platform autonomy in China, as well as the dilemma between over-tolerance and over-regulation in government regulation, on the basis of the reconstruction of the governance boundary, this study puts forward policy recommendations such as changing extensive rigid supervision to prudent and flexible regulation, changing mandatory supervision to cooperative regulation, changing after supervision to whole-process regulation; at the same time, the study proposes to strengthen the compliance capacity building of digital platforms, in order to promote the standardized and healthy sustainable development of China’s platform economy.