In recent years，with the rising of global temperature，extreme weather events occur frequently，especial more and strong hot and dry weather，which leading forest fire occurs frequently. According to the research and analysis，under the influence of climate warming，the accumulation of combustible substances in forest increases，the length of fire weather season tends to lengthen，and the frequency of lightning and wildfire increases. The main forest areas in China have shown an obvious trend of warming and drying. And the potential of forest fire risk has increased significantly in recent years，but the number of fires and the total burned area in the past 10 years have all shown a decreasing trend，which is closely related to the management of forest fire prevention in China and the implementation of the concept of forest protection and ecological development. The model predicts that the Global warming trend will continue. The frequency of dry thunderstorms will increase，including the warning days of forest fires and the fire risk. The forest fire prevention will be more severe. We must strengthen the research on the impact of climate change on forest fires，strengthen the monitoring，prediction and early warning of forest fires，and strengthen the popularization of forest fire prevention.