Abrasive disc thickness measuring instrument and measuring method

The invention relates to the technical field of workpiece measurement, in particular to an abrasive disc thickness measuring instrument and a measuring method. The device comprises a carrying disc installed on a rack, the periphery of a placement area of the carrying disc is provided with manually adjusted positioning clamping blocks, the placement area is provided with a plurality of vertically through measurement hole sites, and the bottom surface of the carrying disc is provided with a rotary supporting gear ring; the rotation driving motor drives the driving gear to rotate so as to drive the abrasive disc on the carrying disc to rotate relative to the thickness measuring mechanism. The displacement sliding block is fixedly connected with the rotary motion mechanism and the carrying disc; the thickness measuring mechanism measures the thickness of the abrasive disc through the sensors in contact with the same point on the two sides of the abrasive disc, and the reading difference value between the displace