Changeable type grooving cutter

The utility model relates to a changeable type grooving cutter comprising a cutter body and a cutter blade. The cutter body is provided with a cutter blade groove, the cutter blade is fixed in the cutter blade groove by a tightening screw, an adjustable block is arranged on one side of the cutter blade, a conical lug boss is arranged on the outer wall of one side of the adjustable block, and the conical surface of the taper lug boss is matched with a rear angle of the cutter blade in a sliding connection manner. The adjustable block is of a hollow structure, an inner cavity is provided with screw threads and is in threaded connection with one end of a double-threaded screw, the other end of the double-threaded screw is in threaded connection on the cutter body, and an internal cooling water outlet penetrating through the cutter body is arranged in the cutter body. By utilizing the changeable type grooving cutter, the cutter body can be reused so that the use cost of a cutting tool is greatly reduced, the cutt