Interlaminar shear failure of steel bridge deck pavement is the main failure of pavement. The combined discrete-continuum model of steel bridge deck pavement composite structure was established to study the interlayer shear behavior of composite structure. The change law of interlaminar failure behavior of steel bridge deck pavement structure under the temperature of 30℃ and the influence of shear rate on the shear stress between steel bridge deck and pavement were analyzed. Research results show that too high or too low driving speed is disadvantageous to the steel bridge deck pavement. Compared with the calculation results of discrete element model, the discrete-continuum model is more reasonable.