Abstract: In order to study the influence of different incline angles on the shape of top coal caving body, and the influence of different strike angles and different caving styles on the top coal caving rate of large angle fully mechanized top coal caving face, this paper carried out the numerical simulation of caving process based on the engineering geological conditions of No.10 fully mechanized top coal caving face in Pangpangta　Coal Mine. It is found that: with the increase of dip angle, the flow speed of top coal accelerates and the discharge amount of coal increases, and the top coal develops at the upper end of dip angle, and the coal rock interface tends to be asymmetrical from symmetry on both sides of the coal caving mouth; with the increase of dip angle, the rate of coal released from top coal decreases continuously, and the rate of coal released from top coal mining is higher than that from top coal mining; the step distance of coal released is 0.8　m, 1.6　m, 2.4 m, when the strike angle is 0°, the top coal caving rate reaches the maximum value; when the strike angle is fixed, the caving rate is the highest when the step distance of caving is 1.6 m; when the mining caving ratio is 1∶2, 1∶2.5, 1∶3, the larger the mining caving ratio is, the higher the top coal caving rate will be; multi-round sequential caving has obvious advantages, and the coal caving rate of working face reaches 86.33%.