In order to analyze the feasibility of upward mining of close thick coal seam in taohutu coal mine, the theoretical calculation of the protection range formed by the mining of lower 3-1 coal seam is carried out, and the influence degree of 3-1 coal seam mining on the whole of 2-2 coal seam and the mine pressure behavior law are analyzed by using theoretical analysis and similar simulation methods. The research results show that: the initial incoming pressure step of 3-1 coal seam after mining is 45m, the periodic incoming pressure step is 18m, the fracture angle at the cuthole is 62°, the fracture angle at the working face is 61°, the height of collapse zone is 44m, the height of water-conducting fracture zone is 83m; the overall continuity of 2-2 coal seam is good, no step misalignment, the range of mining influence coefficient K is 7.31~9.81, 2-2 coal seam is in the fracture zone of 3-1 coal seam. The 2-2 coal seam is within the fissure zone of 3-1 coal seam, which meets the requirements of anti-procedural mining. The research results provide a theoretical basis for similar mining conditions.