Diamond cutting disk

The utility model relates to a diamond cutting disk, which comprises a base body with a center inner hole, wherein the outer edge of the base body forms a plurality of base body edge pages through a plurality of air holes, all base body edge pages are fixedly connected with a diamond cutter head through a fixed element arranged on the edge ends of the base body edge pages, a dust discharge groove is arranged on the diamond cutter head, the cross section of the cutter head is in a concave shape, and the part of the cutter head for cutting diamond materials is only a projected groove tooth of the cutter head. The utility model has the advantages that the sharpness of the diamond cutting disk of the utility model can be improved by 20 to 30 percent, and the service life can also be prolonged by 10 percent. Because of the groove of the cross section, the contact area between the cutter head and the diamond materials can be reduced, at the same time, the resistance is also reduced, the work efficiency is improved,