Abstract: In order to solve the problems that inappropriate supporting parameters selection and vicious spiral of a lot of soft rock roadway easily falling into "former digging after repairing" and "repeatedly repairing and bad" in Chaohua Mine No.31 Mining Area. Combined with the existing research results, we analyze the deformation and failure characteristics of deep big section in soft rock roadway by numerical simulation FLAC, and determine a reasonable argument supporting roadway in deep soft rock on this basis, in the surrounding rock anchor bolt preload performance when the power takes 5 t, row spacing between bolting takes 0.8 m× 0.8 m, a bolting with wire mesh using a length of 3 m, 20 mm diameter bolt; then bolting with wire mesh in a supporting base is formed on the load-bearing structure, structural measures are adopted to compensate for the help section and roadway arch, secondary support selected length of 6.5 m, anchor of 18.9 mm diameter. Through field measurement, using the above parameters achieved good supporting effect.