The shrinking machine is mainly used for the 8/10/12 equal division of the material between the hand samples. The geared motor is inserted into the tray through the extension shaft to drive the equal-feed hopper to rotate at a constant speed. At the same time, the materials contained in the collecting hopper are dropped into the equal-division hopper below the rotating belt through the belt conveyor, thereby achieving equal division. The conversion of 8 equal parts, 10 equal parts, and 12 equal parts is achieved by replacing the hopper.