Abstract: The popularity of social media platform has brought about a thorny problem of network content governance in the digital platform environment. With the technological and capital advantages, the private sector, represented by enterprises, has exerted more power on public issues, and can even directly influence the discussion and decision-making of public events. The governance of social media platform involves the interaction among the state (government), platform, users and other subjects, which gets into a complex game situation. Based on the disputes between the U.S. government and social media platforms, this paper studies the current situation of content governance on the U.S. social media platforms. It is found that there are some problems in governance, such as privatization of public power, public-private confrontation between the government and the platform, triangular conflict and so on.

Key words: Social media platform, Network governance, Platform governance, Content governance, Private power;Public power