In order to reveal the influence of earth pressure on the mechanical performance of orthogonal frame bridge and skew frame bridge in subsidence basin of mining area, the displacement and mechanical response of orthogonal frame bridge and skew frame bridge under different earth pressure conditions are studied by using ANSYS. The following conclusions are obtained: (1) the maximum horizontal displacement of orthogonal frame bridge and skew frame bridge under earth pressure is obtained In the middle area of the side wall of the frame bridge, the maximum vertical displacement is in the middle area of the roof of the frame bridge; the maximum Mises stress is at the junction of the side wall and the bottom plate of the frame bridge; (2) when the earth pressure increases from the static earth pressure to the limit passive earth pressure, the area where the absolute value of the above parameters appears remains unchanged, and the value increases continuously; (3) when the earth pressure working conditions are the same, the slope angle is increased The absolute values of displacement and stress extremum of cross frame bridge are slightly larger than those of orthogonal frame bridge.