Abstract: This paper took Daxing'an Mountains, Inner Mongolia as the research area, took the data of fire risk factors such as tree species burning type, population density, road network density, monthly average precipitation, temperature and wind speed during fire prevention period, using data analysis and cluster analysis to obtain the forest fire risk rating of each forestry bureau and management bureau to complete the fire risk classification. The results showed that the forest fire risk rating of Ituri River is grade Ⅱ, which is a medium firerisk zone (3.97% of total area) and other regions are grade Ⅰ, which are high firerisk zone (96.03% of the total area). Based on cluster analysis, the fire risk rating from high to low is divided into 5 categories: Jinhe is cluster 1 of highest risk (6.04% of the total area); the fire risk of Wuyuan and Deerpuer is cluster 2 (5.49% of the total area); the fire risk of Gan River, Along Mountain, Keyi River, Jiwen, Beida River, Tuli River, Mangui, Aershan, Kuduer, Muir, Ituli River, Ali River is cluster 3 (46.77% of the total area); the fire risk of Genhe, Moerdao, Bila, and Wuerqihan is cluster 4 (22.97% of the total area); the fire risk of Dayangshu and management bureau is cluster 5 (18.73% of the total area). The research results can provide scientific basis and important reference for the relevant departments to formulate disaster reduction measures and strategic decisions for forest fires.