Abstract: In view of the application of roof cutting pressure relief and retaining roadway along goaf technology in soft and thick coal seam conditions, there are problems such as strong dynamic pressure manifestation, severe roadway deformation, and difficulty in implementing the roof cutting pressure relief and retaining roadway along goaf technology, etc, FLAC^3D numerical simulation software is adopted to analyze the deformation law of retaining roadway along goaf under the large mining height soft coal seam condition, the bearing capacity of the flexible concrete filling wall is verified by theoretical calculation, and a surrounding rock deformation control idea of concrete flexible formwork+dense anchor cable beam+single hydraulic support coordinated support is proposed. The numerical calculation results show that the concrete flexible formwork can to some extent prevent the rotation of the roof short arm beam of the retaining roadway along goaf, reduce the deformation of the roadway roof. Based on numerical simulation and theoretical calculation, the support parameters of retaining roadway along goaf are designed and on-site tests are conducted. The on-site application results show that under active support, single hydraulic support and flexible formwork joint support, the roof of the retaining roadway along goaf is intact, and the deformation amount of the surrounding rock is within a controllable range. The on-site application effect is good and can meet the usage requirements of the next working face.