Hot air circulation heating is widely used in asphalt pavement thermal regeneration construction. In order to improve the operation quality and energy consumption of traditional hot air heating asphalt pavement, a variable temperature heating method is proposed. Based on the finite volume method, the two-dimensional transient heat conduction model of asphalt pavement was established, using MATLAB software, the hot air heating curve was obtained to keep the average temperature of pavement surface stable at 180℃, compare the variable temperature heating and constant temperature heating mode of asphalt pavement and 4 cm in the average temperature change curve, calculated the energy loss in the heater under two kinds of heating mode. The results show that the energy consumption difference between the two heating methods is very small, and the heating efficiency can be improved by increasing the initial heating temperature. However, using the obtained variable temperature heating curve to heat the asphalt pavement can effectively prevent the coking phenomenon of the pavement and improve the regeneration quality of the pavement.