<p> The purpose of this study is to empirically examine the changes in bank performance over time before and after government intervention during the COVID-19 crisis for China and USA, and compares their differences. Drawing on government intervention theory and the quantity theory of money, I develop my hypotheses and articulate the mechanisms through which government interventions influenced bank performance during the COVID-19 crisis. The piecewise linear trajectory model is used to test for the research hypotheses using the data spanning from 2019 Q2 through 2020 Q4. The results indicate that banks would benefit from government intervention during the COVID-19 crisis, and the improvement in the average change rate in bank performance after government intervention for USA is significantly higher. Based on the results obtained, practical and policy implications are discussed and relevant issues addressed. This research has the following contributions. First, this study enriches the literature by analyzing the impact of government intervention on the change in bank performance over time during the COVID-19 crisis period. Second, this study employs the piecewise growth modeling, a dynamic approach, to examine the research hypotheses. Third, the findings of this study facilitate understanding the difference between China and USA regarding government invention to cope with the impact of COVID-19. Stronger monetary and fiscal policies are essential to achieve the desired economic effects during such challenging times.</p>