The machine is a large automatic metallographic cutter. The machine has a Siemens programmable controller with high reliability and strong control ability, a human machine interface with touch screen, and a control system with high-accuracy stepper motor. The machine can cut the samples of metal and non-metal materials, so as to observe metallographic and petrographic structure of the materials. The machine, featured by automatic cutting, low noise, easy operation, safety and reliability, is an indispensable equipment in making samples of solid materials in modern labs.