Abstract: Based on the project background of transport downhill in 3# mining area of a coal mine, the U-shape steel frame and bolt-mesh-anchor coupling support technology in deep soft rock coal roadway is proposed according to the roadway deformation and failure characteristics and causes of the original bolt-mesh-anchor support method, meanwhile, the mechanical response characteristics including stress, displacement and plastic zone of roadway surrounding rock and the support effect are analyzed by 3DEC numerical simulation. The results show that the shallow surrounding rock stress of two sides and roof increases obviously, and the deformation and plastic zone depth decrease remarkably compared with the original support; the roof-to-floor convergence, deformation of two sides and maximum plastic zone depth are respectively 108.56 mm, 61.39 mm and 3 m, and the overall support effect of roadway surrounding rock is great. The field monitoring deformation of roof and floor, two sides, and roof separation are respectively about 115.95 mm, 67.00 mm and 0, which verifies the reliability of support technology.