Face milling cutter capable of controlling roughness range of machining surfaces

The utility model provides a face milling cutter capable of controlling the roughness range of machining surfaces. The face milling cutter comprises a plane milling cutter head, wherein cutter holders are arranged on the plane milling cutter head, the approach angle of each cutter holder is 90 degrees, four cutter teeth are arranged on the cutter holders, three of the cutter teeth are triangular blades with cutter point fillets of R0.8, and heights of the three blades are equal; the rest cutter tooth is a blade with the cutter point fillet of R0.2 and is 7 mu m higher than the three blades, and the cutter holder for mounting the rest cutter tooth is radially translated by 0.5 mm towards the center of the plane milling cutter head. According to the face milling cutter, during machining, the standard blades mill planes and remove the machining allowance, the nonstandard blade engraves netted grains on machined surfaces, and the surface roughness is accurately controlled by the aid of the height of the nonstandard blade, the rotating speed of the cutter and the feeding speed.