The invention discloses a manufacturing method of a composite cam piece and the cam piece. The manufacturing method includes: preparing the materials of an inner layer, wherein the inner comprises, by weight, 1-13 parts of C, 0-80 parts of Cu, 0-30 parts of Mo, 0-200 parts of Cr, 0-50 parts of Ni, 0-10 parts of Si and 1617-1999 parts of Fe, and the granularity of the materials of the inner layer is 0.1-200 micrometers. The manufacturing method has the advantages that high wear resistance and high corrosion resistance are achieved while technical problems of defects such as heat cracks and expansion cracks of a mandrel after the cam piece and the mandrel are mounted in an independent manner are avoided.