In 2019，the remarkable characteristics of industrial clustering and cross-regionalization in three provinces and one city in the Yangtze River Delta，as well as the rapid development of modern service industry，have promoted the continuous growth of regional tax sources，the continuous rise of comprehensive tax volume，and the optimization of tax structure. Tax revenue and economic growth maintain a long-term stable and harmonious development relationship. In 2020，the sudden epidemic of COVID-19 brought great impact on the social and economic development of the Yangtze River Delta region. At the same time，with the instability of the external environment and the increase of uncertain factors，the risks and challenges faced by tax revenue and economic development throughout the year are more severe than in previous years. Under foreseeable circumstances，the overall scale of tax revenue and the growth rate of economic development will remain at a medium-to-low speed. Looking forward to 2020-2021，in order to further stimulate the vitality of the market and promote the regional integration of the Yangtze River Delta to a higher level，the Yangtze River Delta region will closely combine epidemic prevention and control with the work of “six stability” through the advantages of integrated system，and establish an integrated regional cooperation linkage mechanism to provide institutional framework and solutions for deep-seated problems such as market mechanism，tax cooperation，financial distribution，factor flow and data sharing in the Yangtze River Delta region.