The invention discloses a burr cleaning method for chamfering position of a plastic bottle forming die. A chamfer mill adopted for the method comprises a chamfer mill body, the chamfer mill body is provided with at least two cutting edges, and the chamfer mill body is provided with a work cavity; the side wall of the work cavity is provided with a lens, the work cavity is furthermore internally provided with a piston, the piston is provided with a light through hole and an installation hole, and the installation hole is provided with a light source; the side wall of the work cavity is furthermore provided with optoelectronic switches, and the optoelectronic switches are electrically connected with alternating-current power sources; the chamfer mill body is furthermore provided with an installation cavity, the installation cavity is internally provided with a circular-arc-shaped protruded block, a first spring is connected between the circular-arc-shaped protruded block and the work cavity, the circular-arc-shaped protruded block is provided with a permanent magnet and a circular arc edge, the upper side of the circular-arc-shaped protruded block is furthermore provided with an electromagnetic block, and the electromagnetic block is sleeved with a magnet exciting coil. By means of the burr cleaning method, the problem that manual deburring is needed after chamfering is completed in a traditional machining manner is solved, the machining efficiency of the forming die is effectively improved, and labor intensity of workers is lowered.