Abstract: In order to solve the problems of high stress instability and mining connection tension in Shaliang Coal Mine, the 135202 working face of Shaliang Coal Mine was taken as the research object.Combined with the geological conditions and overburden characteristics of the working face, the technology and key parameters of roof cutting and retaining roadway without coal pillar were studied by theoretical analysis and numerical simulation.The theoretical analysis shows that the roof cutting height should exceed the key stratum of the roof, and the roof cutting angle should not exceed 15°.The numerical simulation results show that the stress of roadway surrounding rock decreases significantly with the increase of roof cutting height, and the stress decreases slowly after 12 m.The vertical displacement of roadway decreases slightly with the increase of roof cutting height.Finally, it is determined that the roof cutting height is 16 m, the cutting angle is inclined to the rear of the working face by 15°,and the inclination angle to the goaf is less than 15°,and the ϕ21.8 mm×8 000 mm high-strength prestressed anchor cable is used to reinforce the roof of the retained roadway.