Abstract: In order to study the coupling mechanism and mechanical response of “support-surrounding rock” in steeply dipping pitching oblique special-shaped stope, field measurement, theoretical analysis, three-dimensional physical simulation experiment and Rhino + Kubrix + FLAC^3D numerical calculation were used to analyze the mechanism of slip gangue and broken roof on support in different areas of pitching oblique working face, and the mechanical response characteristics of support and the law of action between supports in pitching oblique environment are revealed. The results show that the relationship between “support-surrounding rock” in the steeply dipping pitching oblique stope is affected by the interaction of multiple systems. The breaking position and weighting step distance of the roof rock beam in each area of the stope are different. The caving and sliding characteristics of the roof, the action form and strength of the broken roof in different layers on the support are different in different regions, and the three-dimensional loading anisotropy of the support is different. The roof support in the lower area is in direct contact, and the coal wall is supported by the guard plate, which has little influence on the adjacent support. The sliding gangue and the broken roof act on the middle support shield beam and between the supports, and the support is raised, toppled, and twisted. The “gangue-support-support” system is dynamically unstable, and the extrusion between the supports, and the pushback are the most severe. The relationship between the upper support and the surrounding rock is easily transformed from positive pressure to the upper and lower dislocation and the roof beam is separated, resulting in the local failure of the upper roof along the shield beam. The pitching oblique support is arranged in staggered steps, and the stress distribution in different parts of the support and between the supports is transferred asymmetrically. During normal mining, the lateral compressive stress of the rear column of the support in the middle area is concentrated, the rear end of the top beam is asymmetrically pulled, the stress distribution at the bottom of the lower area is uneven, the normal stress between the middle and upper areas is concentrated. During the weighting period, the lateral compressive stress of the support is concentrated and deflected to the right rear column, and the tensile stress of the upper top beam and the top-shield hinge increases obviously, and it is easy to be inclined and eccentrically loaded along the inclined downward extension. The maximum normal stress is transferred to the rear end of the top beam between the middle frames, the maximum tangential stress is transferred to the upper bracket base, and the degree of inter-frame squeezing in the lower area is reduced. Combined with engineering practice, aiming at the problems of dynamic disasters such as unbalanced load failure of support, dynamic load impact and roof cutting after support, a series of regional stability control measures of “support−surrounding rock” in special-shaped stope, such as partition control of support system, enhancement of gangue filling degree and optimization of support structure, are put forward to ensure the safe mining of pitching oblique working face.