The latest lateral sliding door and electromagnetic lock are adopted to prevent misoperation in the cutting process and greatly improve the safety performance of the equipment. This cutting machine can not only cut circular workpieces with a diameter of less than 100mm, but also cut rectangular samples with a height of 70mm and a width of less than 100 mm. The sample is cooled by the cooling system to prevent the sample from overheating and burning the tissue during cutting. The machine can be divided into manual cutting and automatic cutting, and three different cutting modes can be selected, and the cutting feed speed and cutting stroke can be set, thus improving the quality of cutting samples. The large-volume cutting room is more convenient for the cutter to use, and it is one of the necessary sample preparation equipment for metallographic test in colleges and universities, factories and enterprises.