Abstract: Based on the knowledge of long-term strength of rocks, the strength degradation equation is introduced in the representative volume element to study damage evolution and aging failure of rock surrounding roadway in jointed rock mass with different angles, by applying a numerical simulation method based on RFPA, in view of physical and mechanical properties of rock, strength and elasticity modulus and mesoscopic damage accumulation with time due to the influence of environmental variation. Distribution law of stress field of surrounding rock underground tunnel under the influence of weak interlayer is obviously changed. If the joint angle is 0°, tunnel is given priority to wall caving on both sides. With the change of joint angle, aging damage failure of rock surrounding underground tunnel is also changed obviously, and damage failure zone rotates with the increase of joint angle correspondingly. If the joint direction is vertical, the failure of tunnel focuses on the floor and the vault, with the serious phenomenon of roof caving and floor heave. Meanwhile, displacement of tunnel is obviously changed, and displacement of tunnel presents the general trend of first increase after decrease with the increase of joint angle.