A milling cutter comprises a handle part for clamping the milling cutter, a cutting part and at least two slots, wherein the cutting part at least comprises two edge parts; each edge part comprises a continuous curve edge; a starting point of the curve edge is arranged close to the end surface of the cutting part. The milling cutter is specifically designed for continuously milling non-cascading metal and nonmetal materials; when the milling cutter is used for machining the special cut materials, the service life of the milling cutter can be greatly prolonged and the machining cost can be reduced.