Abstract: The shear stress, when vehicle loads is landed on the surface, is a canon subject in highway engineering. This paper deals with it from a new point of view.A special element model, which is axial symmetry and has quadrangle section, is used,and the equation for computing matrix K and the methods of dividing and enumerating of elements are all given. There is an actual pavement structure using this method mentioned above to illustrate the law of stress allocation. Through analyzing the results, The influence of load magnitude, characters of layers and different load patterns on stress in layers are shown. Some methods used for improving the shear resistance are put forward,and they can be taken as the guidance for design and construction.