The CBN engine cylinder honing stones polishing stones are made of synthetic diamond and metal powder through the process of mixing, pressing, sintering, and grinding. High grinding efficiency, small wearing, economic, and convenient to use. The engine cylinder diamond honing stone grinding stone manufactured is suitable for rough honing, plateau honing, slide honing, helical slide honing, etc. The cross hatches after the honing process will meet the automobile emission requirements of China 5, China 6, and Euro 5 Euro 6, making more efforts for decarbonizing targets.