Cutter and machine tool comprising same

The utility model belongs to the technical field of casting, and provides a cutter which comprises a frame-shaped frame and a connector which are connected, and the connector is used for being connected with the power output end of a machine tool. The frame-shaped frame is a quadrilateral frame body, a first blade, a second blade and a third blade are symmetrically arranged on the two sides of the frame-shaped frame respectively, the first blade is provided with a sharp corner composed of sharp edges on the two sides, and the sharp corner protrudes out of the side surface of the frame-shaped frame; the second blade and the third blade are each provided with an edge edge with one side obliquely arranged, and the edge edges on the second blade and the third blade protrude out of the side surface of the frame. The utility model further provides a machining tool comprising the cutter. The technical problems that according to a machining method adopted in the prior art, different cutters are needed for machining,