LQ-100B cutting machine is composed of machine body, electric control box, cutting chamber, motor, cooling system, cutting grinding wheel, etc. The cutting machine can not only cut circular workpieces with a diameter of less than 100mm, but also cut rectangular specimens with a height of 100mm and a depth of less than 200mm. The machine cools the sample through the cooling system to prevent the sample from overheating and burning the tissue during the cutting process. The machine can also set the cutting speed for cutting different samples, so as to improve the quality of cutting samples. The machine separates dynamic cutting and automatic cutting. The large volume cutting room is more convenient for the cutter to use. It is one of the important sample preparation equipment for metallographic tests in colleges, universities, factories and enterprises.