The invention relates to a special cleaning system for a PDC drill bit. The special cleaning system for the PDC drill bit comprises a base, a rotating shaft and a disk; the rotating shaft comprises afixed shaft and a telescopic shaft; a pair of pin shaft holes are formed in the upper end of the fixed shaft; a plurality of pairs of positioning holes are formed in the lower end of the telescopic shaft; the lower end of the fixed shaft is connected with the middle portion of the upper surface of the base; the upper end of the telescopic shaft is located in a round groove; a supporting frame is further symmetrically hinged to the two sides of the upper end of the telescopic shaft; the other end of the supporting frame is fixedly connected with the bottom face of the disk through a lock pin; three cleaning boxes with openings in the upper surfaces are arranged on the upper surface of the disk; the bottom face of each cleaning box is provided with a water draining hole, and the position ofeach water draining hole is provided with a filter screen; the side face of each cleaning box is further provided with a water inflow hole; the water draining holes are connected with a water collecting box through water draining pipes; and the water inflow holes are connected with a water supply box through water inflow pipes. The special cleaning system for the PDC drill bit has the beneficial effects that the special cleaning system for the PDC drill bit can adapt to cleaning of drill bits at different heights, the stability of the disk and the rotating shaft is improved, water can be effectively supplied in the cleaning process, continuous cleaning is guaranteed, and therefore the cleaning efficiency is improved.