In 2020，China successfully completed the phased goals and tasks of the pollution prevention and control battle，effectively prevented and resolved various ecological and environmental risks，continued to improve laws and regulations related to environmental emergencies，and accelerated the completion of medical waste，hazardous waste collection and treatment shortcomings，and the environment of the river basin. Emergency linkage management has been accelerated. However，the ecology and environment system still faces many challenges. Environmental emergencies are still in the stage of frequent occurrences，environmental emergency management is not sufficiently preventive，environmental emergencies management is fragmented，environmental risk information is insufficient，and social actors are insufficiently involved. This report selects a few typical cases for analysis，in order to provide reference for the early warning and emergency response of environmental emergencies in the future. The next step is to strengthen the environment systematic governance，strengthen the prevention of environmental risks，improve the environmental monitoring system，promote the participation of multiple entities，promote regional and departmental coordination，and improve the ability of responding to online public opinions.