Diamond saw blade

The utility model discloses a diamond saw blade which comprises a circular saw blade body, mounting grooves are formed in the circular saw blade body, cutting grooves are formed in one sides of the mounting grooves, cutting knives are arranged in the mounting grooves, a plurality of mounting grooves are circumferentially distributed in the outer end of the circular saw blade body, the cutting grooves extend to be formed in the bottoms of the mounting grooves, and the tops of the cutting knives are higher than the mounting grooves. The outer side of the cutting knife is arranged on one side of the mounting groove in an extending mode, the outer side of the cutting knife is arranged in the cutting groove in an extending mode, the mounting groove communicates with the cutting groove, the cutting knife is mounted through the mounting groove, meanwhile, the cutting knife is conveniently replaced, and the cutting groove is formed in one side of the cutting knife, so that chippings in the cutting process are conveni