The real GDP growth rebounded as expected in the third quarter of 2020 after the COVID-19 pandemic weigh heavily on economic activity and the ongoing vaccination campaigns offer hope for a return to more normal conditions. Supported by accommodative monetary and fiscal policies，performance of enterprises and financial market presents resilience. However，macroeconomic indicators including unemployment rate did not resume to the pre-pandemic level，and resulted in a low exit of unprecedented fiscal and monetary stimulus. Within a decade-long continuously monetary expansion，not only the monetary policy but also fiscal balance became market focus. Even though the likely transitory result of base-effect and the economic-reopening give a temporary upward pressure come from prices for goods experiencing supply chain bottlenecks，consumer price inflation and the shift of FED policy became a hot topic. The heaven burden of public debt may draw back growth momentum. It is estimated that the US economic growth will be in the range between 5.9%-5.2% in 2021，and slow down gradually to a little higher level of its potential in 2022.