In order to study the equivalence of wheel load in different shapes, by means of finite element numerical simulation analysis, the mechanical response of asphalt pavement under different shape wheel load is obtained, and the load influence region of square wheel load, rectangular wheel load and circular wheel load are studied from three directions of pavement cross-section, driving and road depth respectively. The stress and displacement values of the three were compared from the influence of the region. The results show that the mechanical response of three kinds of wheel load is very close to the surface, and the load influence area has good repeatability, three kinds of wheel load have good equivalence, because the grid partition and so on need to choose the equivalent wheel load of circular wheel load, both the square wheel load and rectangular wheel load are feasible.