Based on the problems existing in the 15203 coal roadway of Lingzhida Mine in Shanxi Province, the rock samples were placed in the indoor laboratory for testing, the rock strength criterion was determined, and the physical and mechanical parameters were measured. Based on the MC strength criterion, the FLAC3D numerical calculation software was used to simulate the deformation of the roadway, the degree of stress concentration and the damage characteristics of the roof and floor of the roadway under the same stress and displacement boundary conditions of the 15203 coal roadway. Combined with the field measured data, the optimal scheme was proposed for the on-site support of the 15203 coal roadway heading face, reducing the support cost, improving the mining efficiency, and meeting the normal mining connection of the mine.