The invention discloses a method for preparing sugarcane tail silage by lactobacillus buchneri and lactobacillus plantarum. The method comprises the steps of cutting mowed sugarcane tails into short pieces with the lengths of 1-4cm; evenly spraying the mixed preparation of the lactobacillus plantarum and the lactobacillus buchneri onto the fresh sugarcane tail raw material to enable the viable count of the lactobacillus plantarum and the lactobacillus buchneri in the fresh sugarcane tails to reach 1*106cfu/g-2*106cfu/g, evenly mixing, filling, compacting and sealing, wherein the density of the mixture is 0.4kg/L; storing the product for 40 days at the normal temperature to obtain the sugarcane tail silage. After the method is adopted, the problem of poor palatability caused when a ruminant is directly fed with the sugarcane tails can be solved; the lactobacillus buchneri is combined with the lactobacillus plantarum for application, so that the content of lactic acid is improved, the content of acetic acid is reduced, and the utilization efficiency of water soluble carbohydrate (WSC) of the silage is improved.