In this paper,combined with the regional characteristic of south province high temperature including heavy axial load,axial load number of times,big gravity of freight train were represented as research bodies.The dynamic characteristic of the cement concrete pavement in the most disadvantageous load location was simulated by using three dimensional finite element methods.The variation of the cement concrete pavement structural mechanics behavior with the important parameter of board thickness,base thickness,base module,foundation stiffness and joints were obtained.The results provided the theory basis and the reference for the design of the cement concrete pavement and the mechanical response of pavement structure under the heavy transportion.