The outbreak of COVID-19 is a comprehensive test of our government's intervention in the economy. It is also an opportunity for China to further deepen reform and comprehensively enhance its ability to deal with major events. In the face of the epidemic situation, it is not difficult to see that the decisive role of effective market in resource allocation requires certain use conditions; If the allocation of capital is too determined by the market, although it is the most efficiency, it is also the worst justification, the profit-seeking of capital will make market subjects chase economic interests too much, and may even violate social morality and law. Therefore, in order to ensure the smooth operation of a country's economy, we must fully understand the essence of government intervention, grasp the relationship between market economy and government intervention, give full play to the principle of moderation and effectiveness of government intervention, and maximize the fairness of market economy through certain measures.