The invention discloses a composite finish-milling milling cutter for a wheel groove. The composite finish-milling milling cutter comprises a milling cutter tip, milling cutter edges, a chip removal groove, a cutting face, a cutter handle, a thread ring, a key groove and a positioning concave hole. The composite finish-milling milling cutter for the wheel groove has the beneficial effects that themilling cutter tip and the milling cutter edges are both prepared through heat treatment machining by adopting vacuum heat treatment equipment, therefore, the hardness consistency and uniformity areguaranteed, and the bending strength is enhanced; the milling cutter edges are distributed in a stepped mode, the included angles formed among the milling cutter edges are the angles with the same size, and therefore the condition that secondary influences are generated on the residual stress of a machined surface layer due to the fact that the milling cutter edges cut in step by step is avoided;the chip removal groove is shaped like a spiral groove and is of a double-sheet structure, a heat radiating groove is formed, and therefore the spiral chip removal groove is more beneficial for chip removal; meanwhile, the cutting speed is greatly increased through the good stability; a layer of electroplated layer is arranged on the surface of the cutting face, and therefore the long-term corrosion prevention performance is achieved; and the positioning concave hole is used for allowing a convex block of an installing groove to be clamped for fixed installation, and therefore the cutter handle of the milling cutter can be well installed on a machine tool.