Major emergencies in public crises are closely related and closely connected with the construction of the grassroots organizations of the Communist Party of China. With the development of network information, the current major public emergencies are greater than any challenge to the social order. The grass-roots organizations of the Communist Party of China, as the main body involved in the handling of the incident, should adapt to the new challenges and continuously improve the organization in the face of new challenges. Construction level. In the process of responding to major emergencies, it is necessary to take precautions and make emergency contingency plans; strengthen the foundation and strengthen the credibility of grassroots party organizations; dare to act and play the role of the vanguard of the party members; take a two-pronged approach and pay attention to both spiritual and material security. In practice, the ability of grassroots party organizations will be improved to win victory in the handling of major public emergencies.