up to the beginning of May 2020，the global epidemic situation is still uncertain. On the whole，the epidemic situation in the major countries in East Asia is in the final stage，the epidemic situation in the major countries in the European continent is under control，but the decline is relatively slow，the epidemic situation in the North America is still in the platform stage，and the number of new cases per day in the platform stage is still high，while the epidemic situation in Latin America，South Asia，Africa and other countries is in the rising stage. The spread of the epidemic in the world will make the global economy fall into negative growth in 2020，which has become the consensus of all parties. On March 26，2020，the G20 special summit was held，and countries announced a package of policies to inject $5 trillion into the global economy to cope with the impact of the epidemic. Based on the analysis of G20 countries，especially Germany’s policies which are more meaningful for China，this paper may help us to get some useful references. At the same time，this paper also looks forward to the possible impact on China’s economy in the context of the global epidemic. Specifically，we conducted an assessment from the aspects of export demand，import supply chain，cross-border capital flow and exchange rate.