In order to control the surface quality of arc edge of the cemented carbide blade, a grinding mechanical model was established by analyzing the relationship between the contact length of a single abrasive particle and the work-piece and the maximum thickness of undeformed chip. Based on the orthogonal experiment method, the machining experiments of the carbide tool with different grinding parameters were carried out, and the saw tooth depth and surface roughness of the tool arc surface were observed by VHX-600 ultra-deep field optical microscope and other observation instruments. Based on the grinding mechanical model and experimental machining results of the arc blade, as well as the saw tooth forming mechanism, the saw tooth and roughness of the arc blade affected by different grinding parameters, blade material and structure were analyzed. The results show that the surface quality and tool durability can be improved by increasing wheel speed, reducing arc rotation speed, reducing grinding depth, controlling the quality of blade material and designing blade structure reasonably. The grinding effect is better when the grinding speed of the wheel is 24m/s, the speed of the wheel is 8°/s, and the grinding depth is 0.05mm, and meanwhile, the grinding force, serrations and surface roughness are smaller.