In the metallographic laboratory, during the preparation of metallographic specimens, pre-grinding, polishing and grinding of the specimens are multiple essential procedures, which are usually completed by using metallographic specimen pre-grinding and polishing equipment; and for the prefabrication of some rough workpieces, some special equipment is required to complete. According to the actual needs of the user’s laboratory and in combination with the various different usage requirements of the user, our company has developed the GPMY-200 spectral grinding machine, which has a novel and beautiful appearance and the entire frame is made of plastic spraying technology. The machine is very convenient to use, and the sandpaper is easy to replace, which saves time and avoids waste. It is equipped with a dust collection device, which is safe and environmentally friendly. The machine starts smoothly, has a large transmission power and low noise. It can meet the preparation requirements of different materials and improve the grinding and polishing quality and preparation efficiency of the specimen. It is an extremely ideal and fully functional metallographic sample preparation.