Based on the rapid development of big data and artificial intelligence algorithm technology, the strength and status of the platform have been significantly enhanced. The platform that controls the power of algorithms can influence the decision-making behavior of a variety of social actors. At the same time, algorithms have created a new type of power-platform private power. In recent years, the continuous expansion of platform private power has brought many adverse effects on the social structure and social order. However, the traditional platform supervision system has not been adjusted in a timely manner, and the risk of abuse of platform private power has increased significantly. In the field of communication, the problem of abuse of private power on social platforms has begun to become prominent. A correct understanding of the real hazards of the abuse of private power on social platforms, and timely prevention and resolution of the negative social impacts brought about by it, will appear to be particularly important in promoting the modernization of the national governance system in the future. A new platform governance model of "government-individual-social forces" trinity should be established to avoid the ills of platform supervision caused by the government's post-accountability.It can also alleviate the difficulties of users' rights protection in the confrontation with the platform and promote other social forces participate in platform governance together.