The utility model discloses a ball mill discharging grid plate, which is characterized in that: the gap dimension is 6 to 7mm. The gap structure of the ball mill discharging grid plate is suitable to the powder milling with 8 to 14mm ball forging so as to avoid the broken forging and smaller milling elements from causing obstruction toward the discharging grid plate, to reduce the grid plate's cleaning times and to increase the normal running ratio of the equipment.