The invention discloses a PDC drill with detachable cutting teeth and hobbing cutters. Compared with traditional PDC drills, the PDC drill is mainly characterized in that firstly, the polycrystalline diamond compacts cutting teeth are integral cutting teeth, and a certain cutting tooth can be dismounted and replaced with a new cutting tooth after being abraded; secondly, the center of the drill is provided with three taper cutter inclined by a certain angle which further plays an auxiliary effect on the drilling effect of the drill; and thirdly, a tool body of the drill is provided with the three axial multi-tooth hobbing cutters, a good drilling effect is achieved on an outer coal petrography layer in the drilling process, the drilling process is made to be simple, and the cutting teeth are protected to a certain extent. According to the drill, waste of the drill is greatly reduced, the whole drilling process is made to be simple, the working efficiency of the drill is improved to a great extent, and the service life of the whole drill is prolonged to a great extent.