Abstract: BISAR 3.0 was utilized to calculate two kinds of the mechanical behaviors of traffic load of flexible base asphalt pavement structure at different temperatures, the load was double circular uniform vertical load and the standard axle load BZZ-100, in which wheel loadP=25 kN, wheel pressurep=0.7 MPa, radiusd=0.106 5 m and the contact state was completely continuous. Through the calculation, the change law with temperature of the road surface deflection, tensile stress and shear stress and the base bottom layer tensile stress and shear stress was studied and compared to explore the most flexible pavement structure