In order to solve the problem of the uniformity of coke charging in large-scale coke dry quenching furnace, the coke charging process of 260 t/h large-scale coke dry quenching furnace in Shougang was analyzed by using three-dimensional discrete element method. It was concluded that with the increase of the bell angle, the tip of the coke stack gradually moved toward the center. When the bell angle was 50°, the difference between the coke quality and coke particle size in the x-axis and y-axis directions was the smallest, and the distribution was more uniform. The increase of the stockline level caused the summit of the coke stack to gradually move towards the wall of the reserve chamber. When the stockline level reached 11 m, the double peak shape of the coke stack disappeared, which was not helpful to control the uniform decline of coke in coke dry quenching furnace. Therefore, the best stockline should be less than 11 m.