In 2020, with the rapid spread of the epidemic worldwide, the financial markets of the United States and other countries experienced a huge impact rarely seen in history. This paper focuses on analyzing the impact of COVID-19 on the US economic situation and the bond market. It explores the potential logic of some US government policies to deal with the impact of COVID-19 on the bond market. In addition, this paper also compares and analyzes policies with real-time data to judge the effectiveness of various policies. Currently, the US government actively implements monetary and fiscal policies and prudently responds to the negative effects of these policies. The large-scale purchase of government bonds and the corresponding quantitative easing policy are gradually started among them. These changes effectively controlled the indicators of the US bond market. At the same time, some other policies are carefully managing risks, such as a spike in inflation. Finally, the United States successfully reduced the economic losses caused by the epidemic and survived the crisis.