The invention relates to a combination drug therapy composition used for treating amyotrophic lateral sclerosis and a preparation method and use thereof. The composition includes chlorogenic acid, vitamin E, vitamin C, coenzyme Q10, creatine phosphate sodium and a pharmaceutically acceptable carrier, wherein the chlorogenic acid, the vitamin E, the vitamin C, the coenzyme Q10, and the creatine phosphate sodium are unit preparations having same or different specifications and are administrated separately or together. After combination of the chlorogenic acid, the vitamin E, the vitamin C, the coenzyme Q10, and the creatine phosphate sodium, unexpected synergistic treatment effect on the amyotrophic lateral sclerosis is achieved, and therefore, the composition used for treating the amyotrophic lateral sclerosis and having excellent treatment effect is provided, and the composition can obviously delay disease progression of the amyotrophic lateral sclerosis.