The invention provides a spiral tooth feeding grinding disc for natural hard stone, which can effectively refine pulp and powder and dissipate heat, improve the quality of pulp and powder, and can be used as a replacement for easily worn grinding discs of a pulping and pulverizing machine. It consists of 1, It is a plane inner disk, 2, locking hole, 3, bearing hole, 4, feed hole, 5, feed groove, 6, helical helical tooth of spiral form. A bearing hole 3 is drilled in the center of the plane inner disc 1, the locking hole 2 is drilled on the grinding disc for locking and fixing, the bearing hole 3 is drilled on the center of the plane inner disc, the feed hole 4 is drilled on the plane inner disc 1, and the feed groove 5 chain feeding hole 4 opens out the chute, and the spiral helical tooth 6 divides the grinding disc into five equal parts, and takes the radius line as the baseline along the feeding groove 5 to form the grinding surface of the grinding disc, and the grinding surface of the grinding disc is discharged from the other half The grinding discs cooperate to start the power, and the food enters from the feeding hole 3 and starts to refine and grind through the feeding groove 5. The helical helical teeth 6 not only refine the pulp and grind finely, but also play the role of ventilation and heat dissipation.