Abstract: Domestic BS100 broach grinding machine has backward design technology and low production process standard. It is difficult to meet the requirements of current broach manufacturing process. In electrical control, advanced technology is adopted to carry out numerical control transformation. Effectively improve the level of CNC machine tool and processing efficiency. In the process, no-dressing forming grinding wheel and high-pressure cooling processing are used reasonably to improve surface temperature of grinding wheel and surface roughness of broach. The application of broach pitch automatic measurement technology, solved the problem of repeated grinding during manual grinding, achieve the broach precision grinding.