This paper deals with the mechanical property of a new designed bridge pavement of box girder bridges. Our concerning is the stress change at the interface between the steel deck and the pavement due to the vehicle wheel loads, which can be considered as a kind of concentration force to the pavement. The finite element method is utilized to analyze the present problem. Several simulations are carried out by taking account of different positions of the vehicle wheels in order to simulate the interface stress change under real conditions. The present results can be a helpful reference for steel-deck pavement design.