The Grassroots Party Organizations are the foundation of all the work and fighting capacity of the Party and its ruling.It is a valuable experience for the Party and the state to make full use of the role of political guarantee,organization mobilization and vanguard role of the Grassroots Party members in dealing with major emergencies.In the COVID19 epidemic prevention and control work,the Grassroots Party Organizations have been consciously taking full responsibility for leading the epidemic prevention and control,coordinating social resources,organizing the people and offering psychological guidance.There are new challenges to the COVID19 epidemic prevention and control because of the changes in the Grassroots Party Organizations themselves and the social environment,such as the weakening of the political functions of some Grassroots Party Organizations,the diversification of governance subjects,the diversity of the interests of the people and the spread of information online.In the new era,the Grassroots Party Organizations should take improving the ability to deal with major emergencies as an important goal,including political ability,governance ability,network application ability and ability working with the people and constantly reinforce their power in political leadership,social mobilization,mass organization and public opinion guidance in major emergencies.