The invention discloses a toothed diamond clad sheet comprising a disc-shaped clad sheet body, wherein the clad sheet body is formed by compounding a polycrystalline diamond layer with a hard alloy substrate. The clad sheet body is shaped like a cylindrical gear; in other words, a plurality of gear teeth arranged radially and projecting outwards in the radial directions of the clad sheet body are arranged on the side surfaces of the clad sheet body. The toothed diamond clad sheet is simply improved in structure so that the diamond clad sheet can be fixed in the mounting holes of drilling teeth more reliably.