according to the paving mode, the impact of full-width paving and partial paving was analyzed. For each paving mode, bination of the most unfavorable factors and the adjusted parameters were analyzed. The mechanical responses of the bridge structure under different conditions were obtained, mainly Von Mises stress and horizontal reaction force of the bearing and displacement. After calculation, in the most bination, the highest stress (full-width pavement construction method) is 223Mpa, and the horizontal reaction force of the bearing is 350t, with parameter adjusted, the stress and bearing reaction force are all decreased to allowable values. This confirmed the feasibility of this adjustment plan.РKeywords: temperature field; heat conduction theory; steel box girder; mechanical calculatio