Abstract: The 122104 longwall face of Caojiatan Coal Mine has practiced the mining technology of 10 m super-large mining height. The mining practice shows that the violent movement of overlying thick and hard roof on the super-high longwall face makes the longwall face present strong mine pressure and strong dynamic load characteristics, which leads to the difficulty of surrounding rock control and restricts the mining efficiency. In response to the problem of the mechanism of thick and hard roof breaking and strong rock pressure in ultra-high longwall face is unclear, the characteristics of strong rock pressure in super-high longwall face are analyzed and counted, the evolution characteristics and influencing factors of mining stress in super-high longwall face are studied, the regulation effect of mining stress rotation on the breaking characteristics of thick and hard roof is analyzed, and the mechanism of strong minging pressure in super-high longwall face is revealed. The results show that there is a significant difference in the resistance characteristics of the support before and after the pressure. The resistance increase is rapid in the pressure stage, and the resistance increase speed is concentrated in the area of 280 kN/min and 1180 kN/min. The four-stage evolution characteristics of the mining-induced stress rotation trajectory of the super-high longwall face are obtained. The adjacent stope at the end stage of the rotation trajectory has a direct impact on the fracture of the stope rock layer. The lower the rock layer at the end stage is, the greater the maximum principal stress dip angle is. The influence of mining height and roof thickness on the rotation trajectory of mining stress is studied. The higher the mining height and roof thickness, the greater the inclination angle of the maximum principal stress at the end of the rotation trajectory, and the roof thickness has a significant effect on the inclination angle of the maximum principal stress. The weakening effect of mining stress rotation on the bearing capacity of rock strata is obtained. The stress driving mechanism of fracture evolution of thick and hard roof 'combined cantilever beam with inverted bench' structure is analyzed, and the relationship between fracture propagation direction and mining stress direction is expounded. The fracture angle interval of rock strata under different mining height and roof thickness is obtained, Under the condition of thick and hard roof in super high longwall face, the fracture angle of roof increases. On the one hand, it is difficult to transfer the load of overlying strata to the gangue in goaf, and the support will be in a high static load state for a long time. On the other hand, the friction effect between rock block and gangue in goaf is weakened, and the weakening effect of dynamic load on roof fracture is reduced, which leads to the increase of dynamic load impact of support. The calculation method of support resistance and dynamic load under different roof fracture angles is proposed. The principle of strong mine pressure control by regional fracturing pressure relief in thick and hard rock group is obtained, and the principle of determining fracturing pressure relief horizon is put forward, which improves the control effect of surrounding rock in super high longwall face. The research results have certain guiding significance for the control of surrounding rock in super high longwall face with thick and hard roof mining.