A novel lever-styled high-speed fruits discharging assembly for automated fruits grader was developed, which could be integrated into the roller conveyor of the fruits grader without interfering the transportation and rotation of the fruits in the transportation period, and could discharge fruits automatically at a high speed under the instruction of the grader controller in the discharging period. The shape of the lever and the discharging cam has been optimized to ensure that fruits would not receive any damaging impact during discharging. The practical operating results showed that the discharging assembly designed could discharge apples with diameters of 50~100 mm at high-speed with smoothly running, and the apples had no visible damage after discharging.