In the preparation of metallographic samples, the grinding of the sample is an essential process. The grinding of the sample is generally divided into two processes: rough grinding and fine grinding. The purpose of rough grinding is to obtain a flat surface, which is generally completed on a grinding wheel, and there are still deep marks on the surface of the sample. The purpose of fine grinding is to eliminate these abrasion marks to obtain a flat and smooth grinding surface, which is ready for the next polishing. The M-1 metallographic sample grinding and polishing machine can be used for the fine grinding of metallographic samples. The shell is made of integral blister, with a novel appearance. It has the characteristics of smooth rotation, low noise, convenient operation and high work efficiency. It also has its own cooling device, which can cool the sample during grinding to prevent the metallographic structure from being damaged due to overheating of the sample. It is suitable for metallographic laboratories in factories, colleges and universities, and scientific research units, and is an excellent equipment for pre-grinding metallographic samples.