Abstract:The outbreak of the new crown epidemic has brought severe challenges to the prevention and control of infectious diseases in China. Green space is the most flexible public space in the city. In order to promote the efficient use of green space prevention and control effectiveness, this article discusses the role of urban green space in defense, mitigation, and governance in response to the epidemic based on the existing problems and development trends of the green space disaster prevention and avoidance plan under major public health incidents. In addition, a planning strategy of the urban green space prevention and control unit is proposed from the three spatial scales of city level, district level and community level, forming an operation and management mechanism that combines normal and epidemic prevention, in order to establish a “network + point-like” green space prevention and control unit system in the city, effectively organize urban green space and other disaster prevention spaces, and reduce casualties and property losses in the city during emergency periods.