Abstract: For the roundness of the whole ball batch after grinding the bearing steel ball billet can reach the ball grade required by industry, and the quality is consistent, optimize the tray mechanism to achieve continuous, uniform and complete loading of the ball flashing machine. The motion of the ball billet in the plate mechanism was analyzed, and two key factors affecting the uniformity and continuity of the ball billet were obtained: the inclination angle of the transporting materials plate and the ball baffle. The influence of various factors on the uniformity and continuity of ball loading was simulated by EDEM software, and the best combination parameters of ball loading effect were obtained: the slope of the loading plate was 8° and the slope of the baffle plate was 40°; the feeding mechanism is tested under this combination parameter, and it is found that there is no steel ball accumulation at the ball outlet. The uniform and complete effect of the plate mechanism loading material is good, and it can meet the operating requirement.