Analysis of monopoly crisis in Internet Economy -- Based on market equilibrium model

With the development of science and technology, the era of Internet economy is coming. The market structure of each segment of the Internet industry presents the characteristics of platform monopoly. This paper uses marginal analysis and game theory as the main analysis tools to make a comparative analysis of the Internet oligopoly market and the fully competitive market, focusing on the impact of platform monopoly on social welfare. At the same time, according to the analysis, it reconstructs the Countermeasures of anti-monopoly law, enterprise self-examination and price regulation.