High-precision adjustable reverse indenting cutter and using method thereof

The invention provides a high-precision adjustable reverse indenting cutter which comprises a cutter bar and a cutter body. A square groove matched with the lower portion of the cutter body is formed in one end of the cutter bar in the radial direction, and the lower portion of the cutter body is arranged in the square groove and can be fixed through first locking screws axially arranged at the end of the cutter bar. The upper portion of the cutter body is provided with a protruding portion protruding towards the inner side, one side of the protruding portion is provided with a regular triangle groove matched with a blade, the blade is fixed in the regular triangle groove through a second locking screw, and a threaded hole parallel to the square groove is formed in the position, close to the inner side of the square groove, of one end of the cutter bar in the radial direction. An adjusting screw is arranged in the threaded hole, the protruding part is extruded by rotating the adjusting screw, and the radial d