China is one of the main "climate fragile areas" in the world, with frequent natural disasters, wide distribution and great losses, and it is one of the countries with the most serious natural disasters in the world. The facts observed in the 20th century show the frequency and intensity of extreme weather and climate events (El Nino, drought, flood, thunderstorm, hail, storm, high temperature weather and sandstorm, etc.). ) caused by the obvious increase in climate change, which directly endangers the development of China's national economy. Therefore, I think we should attach great importance to disaster prevention and mitigation now. Disaster prevention and mitigation should adhere to the basic policy of "prevention first", put disaster monitoring, forecasting and early warning in a very prominent position, attach great importance to and do a good job in releasing early warning information for the whole society, including the socially disadvantaged groups. Meteorological disaster is a sudden public event with long warning time and high forecasting accuracy. Strengthening the short-term and imminent forecast of disastrous weather, strengthening the production of early warning signals of sudden meteorological disasters and strengthening the release of meteorological early warning information are important scientific and technological guarantees for improving the level of disaster prevention and mitigation. We should rely on science and technology to improve the comprehensive quality of disaster prevention and reduction. By strengthening scientific research and technological development in the field of disaster prevention and mitigation, adopting and popularizing advanced monitoring, forecasting, early warning, prevention and emergency treatment technologies and facilities, giving full play to the role of experts and professionals, and improving the scientific and technological level of responding to natural disasters. Governments and social organizations should organize and publicize disaster knowledge and train disaster professionals or volunteers. Relevant departments widely publicize the common sense of disaster reduction through books, newspapers, audio-visual products and electronic publications, radio, television and the Internet, so as to enhance the public's sense of urgency, social responsibility and self-help and mutual assistance. Through the action of "disaster prevention and mitigation into communities, campuses, enterprises and villages", grassroots community residents, primary and secondary school students, employees of enterprises, farmers in rural areas, especially in remote areas, and socially disadvantaged groups will enhance their awareness of disaster prevention and mitigation, master the basic skills of disaster avoidance, self-help and mutual rescue, and achieve the purpose of disaster reduction. Disaster prevention and mitigation needs to start with dolls and incorporate disaster and disaster emergency knowledge into the teaching content of primary and secondary schools. Relevant departments should prepare brochures and publicity materials for natural disaster prevention, widely publicize and popularize disaster knowledge, emergency management knowledge, disaster prevention and mitigation knowledge, and improve grassroots people's ability to participate in emergency management and self-help. The public should fully understand the important role of disaster early warning information, understand the meaning of all kinds of early warning information, and take active and effective countermeasures according to different early warning information and different early warning levels when receiving disaster early warning information. It is necessary to establish a wide and smooth channel for early warning information release. Early warning information is released through radio, telephone, short message, block display screen and Internet, and important early warning information can be immediately inserted in TV programs. Relevant departments can ensure that disaster warning information reaches effective users within effective time, so that they have the opportunity to take effective defensive measures to reduce casualties and property losses. The risk of natural disasters refers to the degree of disasters that may be reached in the next few years and the possibility of their occurrence. Carry out disaster risk investigation, analysis and evaluation, understand the occurrence regularity of different disasters in specific areas, understand the impact of disaster-causing factors of various natural disasters on nature, society, economy and environment, and the short-term and long-term changes of the impact, and take actions on this basis to reduce the risk of natural disasters and reduce the losses caused by natural disasters to social economy and people's lives and property. Natural disaster risk assessment includes disaster monitoring and identification, determination of natural disaster classification and evaluation criteria, establishment of disaster information system and evaluation model, disaster risk assessment and countermeasures.