Abstract: This paper studies the influence of rock weathering on the stability of surrounding rocks on the basis of the durability test of rocks and theory analysis and numerical simulation methods. Weathering will make the roadway deformation increased and plastic zone expanded which are caused by nature deterioration of rock itself. The stress of surrounding rocks will decrease. These trends are accelerating with the increase of the weathering degree. The worst section is the rectangular cross section. The influence of weathering in deep condition is larger than shallow in the same section. For different layered rock masses, the stress and deformation is different.