Abstract: In order to study the correlation between ground flash frequency and the sensitivity factors of disaster-prone environment, the area where ground flash occurred in Yunnan Province from 2007 to 2016 was divided into 1 km×1 km grid cells; and the ground flash density, highest altitude, maximum slope and standard deviation of altitude (topographic relief) of each ground flash grid were counted. Probability statistics theory was used to analyze the probability distribution of altitudes, slopes and standard deviations of the ground flash grids. At the same time, the correlation regression method was used to analyze the correlation between the ground flash density and the normal probability density function of the altitude, slope and standard deviation of the ground flash lattice. Meanwhile, the multiple regression equation was established and verified. The results show the normal distributions of the altitude sequence, slope sequence and topographic relief sequence corresponding to the ground flash. There is a significant linear relationship between the ground flash density and the normal probability density function of the altitude, slope and standard deviation of the ground flash lattice; and the linear regression fitting result can represent the sensitivity of disaster-prone environment of the ground flash.