Abstract: In order to study the application and heating effect of 915 MHz microwave in asphalt pavement high-power microwave regeneration heating equipment, the influence of 915 MHz microwave on the heating effect of reclaimed asphalt pavement (RAP) with different thicknesses and factor combinations are analyzed through simulation modeling, and the mathematical relationship between multiple factors and heating effect of microwave antenna in different arrangements are obtained, and a single magnetron experimental device is built for heating thickness experiment. The results show that when the heating thickness, arrangement mode and heating parameters change, the change of heating effect presents a complex change law, among which RAP thickness and antenna arrangement have obvious influence on heating. When the thickness is 250 mm and the antennas are arranged side by side, the RAP temperature from 120 ℃ to 180 ℃accounts for 98.10%, and only 0.60% above 180 ℃, and the temperature dispersion coefficient is 0.089, which has good heating uniformity and the best heating effect. However, with the increase of RAP thickness, staggered arrangement shows better heating effect. It is determined that the optimal heating thickness of RAP is about 150 mm to 250 mm, and the maximum should not exceed 450 mm by the experiment, which provides theoretical and experimental basis for the design and manufacture of heating chamber of 915 MHz microwave high-power microwave regeneration heating equipment on asphalt pavement.