Abstract: In order to explore the deformation failure characteristics of large mining height stope roof under the effect of dip angle, based on the comprehensive analysis of roof deformation and sliding filling characteristics, this paper studies the roof caving and migration filling law of large-mining-height working face under different dip angles. The results show that due to the influence of the dip angle of the working face, the deformation and failure of the surrounding rock and the filling form show obvious asymmetric characteristics. With the increase of the dip angle of the working face, the length of the gangue support area increases, and the unbalanced constraint effect of the filling gangue on the roof along the dip and strike is enhanced. The regional characteristics of the loading and deformation failure characteristics of the stope roof and the pile-hinge structure formed after the failure are more obvious. The damage degree of the roof in the middle and upper parts is increased, and it is easy to slip and deform and lose stability, forming impact pressure, resulting in a significant increase in the unbalanced loading degree and instability probability of the support in different areas. The stability of the ' support-surrounding rock ' system is greatly reduced, which is easy to induce the disaster of surrounding rock in the working face.