The platform economy has become a typical model of the new economy，and its contribution to economic growth has become more prominent，but there are also problems such as consumer rights protection，taxation and monopoly. Comparing the platform economic development between China and the United States，we can find that，overall，the US platform economy is more competitive with China. However，in concrete terms，China’s development momentum is strong，and the future may be evenly divided with the United States in the development of the platform economy. China’s Internet industry policy has greater advantages than the US，which is beneficial to Chinese Internet companies to increase market share and enhance international competitiveness. In terms of Internet industry platforms and Internet platform-based enterprises，China is less competitive than the United States. In terms of the economic development of the platform，China has more problems than the United States. For example，in terms of consumer rights protection，taxation and monopoly，the United States has a more complete legal mechanism，consumer rights protection mechanism，taxation system and anti-monopoly mechanisms that which can better address these issues. China still has a long way to go in these areas. In particular，China is still in the development stage of continuous improvement of market mechanism. In the development of platform economy，it is necessary to deal with the relationship between market supervision and platform governance.