Abstract: We use fluid motion analog simulation criteria to determine the model parameters of coalfield outcrop fire area. According to the parameters, we make simulation experiment devices, and use the experimental devices to simulate burning process of outcrop fire area. It is concluded that the greater the burning distance of coal fire, the smaller spread speed in the outcrop fire area. And we fit and get the relationship between the coal fire burning distance and velocity. By changing the wind speed of import, it is obtained that the greater the wind speed the greater the fire spread speed and the longer the burning distance.