Abstract: In response to the problems of large number of excavation workers, high labor intensity, low efficiency, and low single entry level in the current stage of mine coal roadway support using U-shaped steel shed support, this paper studies the optimization of active and passive joint support parameters for the "three soft" coal seam mining roadway. The rock classification of the mining roadway in coal seam 21 is proposed, and four indicators including average surrounding rock strength, geostress, average support strength, and mining impact are proposed. K-means clustering algorithm is used for clustering analysis, and the mining roadway in coal seam 21 can be classified as IV-V, which belongs to unstable or extremely unstable roadway. Theoretical methods were used to analyze the ultimate bearing capacity and actual bearing capacity of U-shaped steel supports in the Er1 coal seam of Wangxingzhuang coal mine. A design scheme for the "U-shaped steel+anchor cable" active and passive support structure was proposed. The deformation characteristics of the U-shaped steel support were simulated using ABAQUS numerical simulation software, and the ultimate bearing capacity of the defective U-shaped steel support under four typical loads was simulated. The influence of different support spacing on the deformation of the surrounding rock of the roadway under joint support conditions was analyzed. The results showed that when the support spacing was 600-800mm, the deformation of the surrounding rock could be effectively controlled. Research can improve the excavation speed of the "three types" of coal mine tunnels, reduce the labor intensity of workers, alleviate the tight situation of mining succession, and lay the foundation for standardized construction of mines.