Tool device for taking bushing in fuel injector hole out

The invention discloses a tool device for taking a bushing in a fuel injector hole out. The device comprises a threaded rod (1) with a conical part (11) and a sleeve (2) which is matched with the conical part in a threaded way; and the outer circle of the sleeve is provided with a plurality of dentoform structures and when the sleeve moves axially relative to the conical part, the sleeve is expanded or reduced in the radial direction. When the bushing is taken out by the special tool device, operation of tapping and the like is not needed, so that the efficiency of taking the bushing out of the fuel injector hole is improved; meanwhile, the action force between the sleeve and the inner wall of the bushing is in the radial direction of the bushing, the taking-out direction of the bushing is in the axial direction of the bushing, the application of the axial force does not influence radial force, in the process of taking the bushing out, and the acting force between the bushing and the sleeve is not reduced, so