One kind of light-weight metal-rubber bushing of four rod couplings was introduced, which reduced weight by using thealuminum. Through FEA calculation, pre-compression verification, fatigue test, and a little batch production verification, the reliability ofthis light-weight metal-rubber bushing was verified. As the axle load was constant, light-weight parts design could reduce the weight ofvehicle and add load, which satisfied the development trend of rolling stock.