Abstract: The stress distribution of the surrounding rock of the trapezoidal roadway is characterized by asymmetric distribution, which is prone to stress concentration and instability of the roadway. Taking the 3410 working face of Chenmanzhuang Coal Mine as the background, using the theory of roadway surrounding rock loose circle, analyzes the stress distribution characteristics of the trapezoidal roadway roof, deduces and calculates the maximum radius of the surrounding rock plastic zone, and then carries out mechanical analysis on the existing mining roadway support methods, and checks the support strength under the current support. The FLAC^3D numerical simulation research is used to reveal the stress distribution and deformation law of surrounding rock under the current support conditions. Facing the floor heave of the roadway floor, the creep of the roof, and the local slip of the high wall, a reinforcement support scheme is proposed based on the original support an anchor cable is placed at the upper part of the middle of the high wall, and the original support anchor cable moves down 1 600 mm. At the same time, the anchor cable reinforcement support is added in the low wall, and the original anchor bolt and anchor cable are replaced with high-strength anchor bolt and anchor cable to improve the bearing capacity of the surrounding rock of the roadway. Through the numerical simulation, it is verified that the optimized support layout has significant control effect on the surrounding rock, can meet the production needs, and effectively controls the deformation and destruction of the roadway surrounding rock.