The invention relates to a method for manufacturing a driving gear of a motorcycle clutch, which is characterized by sequentially comprising the following steps of: (1) preparing a raw material, namely mixed powder of iron, chromium, molybdenum, nickel, carbon and copper, and adding a required amount of lubricant; (2) pressing the mixed powder into a driving gear part with the density of more than 7.3g/cm<3> on a pressing machine with the pressure of more than 600MPa; (3) sintering, namely sintering the driving gear part in a vacuum sintering furnace or a continuous sintering furnace at the temperature of between 1,100 and 1,350 DEG C for 10 to 120 minutes; and (4) performing heat treatment, namely determining a heat treatment process according to the chemical component requirement of the sintered part, quenching at the temperature of between 800 and 1,000 DEG C, preserving heat for 30 to 45 minutes, tempering at the temperature of between 150 and 400 DEG C, and preserving heat for 110 to 130 minutes. The method has the advantages that: the manufacturing process is simple; the driving gear has high accuracy, strength and surface smoothness; and the problem that a die is easy to crack because the forging process is performed at a high temperature is effectively solved, so that production cost is reduced, and production efficiency is improved.