Automatic grinding ball adding device

The utility model discloses an automatic grinding ball adding device which comprises a conical charging barrel and a lifting device, and the lifting device comprises two screws, a gear set and a motor; a long-strip-shaped ball inlet notch is formed in the conical material barrel along the inclined barrel wall from bottom to top, the two screws are arranged in the ball inlet notch in parallel in a spaced mode, the two screws are provided with threaded grooves, the thread pitches of the two threaded grooves are equal and matched, a concave area only allowing one grinding ball to be embedded is formed in the matched position in a spaced mode, and the lower ends of the two screws are connected with a gear set. The motor is connected with the gear set to drive the two screws to rotate simultaneously; and the conical charging barrel is provided with a discharge port at the upper ends of the two screws. The conical charging barrel can store grinding balls, meanwhile, automatic feeding can be achieved according to th