Abstract: Based on forest fire data in Liangshan from 2017 to 2020, this paper studies the spatial and temporal distribution characteristics of forest fire as well as calculates the Forest Fire Danger Index (FFDI). The results show that: The frequencies of light fire risk of class 0 and class 1 are higher than other classes, and the frequency of class 3 fire risk is higher than class 4 and class 5. The fire risks in Liangshan are mainly class 3, and except for the eastern part, the number of class 3 fire risks is more than 600 times. The high incidence of fire risks in Liangshan is in spring ( March to May ) and winter ( December to February of the next year ). In general, the fire risks are mainly class 3, and different regions and seasons have different probabilities of fire classes.