Grinding is a widely used metal cutting method. It mainly processes hard materials that are difficult to cut with traditional cutting tools, and materials that require high surface quality and dimensional accuracy. With the emergence and application of a large number of new materials on the precision and quality of parts, the application of grinding has grown more rapidly than other traditional processing methods. Grinding process, the size, shape and distribution of the abrasive particles play an important role in processing, but in the processing of ductile metals, the wheel suddenly plugged and passivated, resulting in shortened wheel life, in order to avoid the wheel blockage passivation and adverse effects It is necessary to analyze the mechanism and origin of the wheel blockage.