Since the outbreak of COVID-19，Beijing has responded quickly，forming a collective force of the whole society to fight the epidemic，and achieving the goals of social mobilization in emergency response. Since SARS，the emergency social mobilization system in Beijing has experienced many emergencies and accumulated a lot of valuable experience. The COVID-19 prevention and control has achieved remarkable results，but at the same time，many deep-seated problems have been exposed. The emergency social mobilization in Beijing lacks the mobilization concept of the whole process of emergency management. The structure and function of emergency mobilization mechanism in Beijing are unbalanced，and the institutional environment can not meet the needs of emergency social mobilization. Social mobilization for emergency response lacks resilience，single strategy and insufficient application of new technologies such as big data. In the future，Beijing should strengthen the risk management，crisis management phase of social mobilization，close the institutional gap，enhance the level of social mobilization and implementation of emergency process，mobilizing all phases of emergency relevant systems of the social mobilization，promoting the transformation of social mobilization strategies for emergency response，strengthen in the process of emergency management for the use of new technologies.