Abstract: Based on the discrete element development environment YADE under Linux environment, this paper develops a three-dimensional simulation system for continuous feeding and coal caving in fully mechanized caving face. The system which sets the coal caving parameters based on the real geological environment of the coal mine can effectively simulate the swing of the tail beam, the pushing action of the hydraulic support, and the mixed dynamic change process of the coal and gangue on the top of the tail beam during the coal caving process. On this basis, the comparison experiments of single-wheel coal caving and double round coal caving were carried out. The experimental results show that the three-dimensional model of feeding and coal caving can truly simulate the top coal caving process. It also provides a new method for studying the top coal caving law of fully mechanized caving mining from three-dimensional perspective; under the condition of continuous feeding and coal caving in fully mechanized caving face, the effect of double-wheel sublevel interval caving is the best, the average top coal recovery rate is 86.64% and the gangue rate of 4.06%.