The invention discloses a graded high-nickel ternary anode material, and a preparation method and an application thereof. The graded high-nickel ternary anode material is prepared by the following method: 1) mixing a high-nickel polycrystalline precursor with anhydrous LiOH and a doping additive, performing sintering, mixing the obtained product with a coating additive, and performing sintering toobtain a high-nickel polycrystalline material; 2) mixing a ternary monocrystalline silicon precursor with a lithium source and the doping additive, performing sintering, mixing the obtained product with the coating additive, and performing sintering to obtain a ternary monocrystalline silicon material; and 3) mixing the high-nickel polycrystalline material with the ternary monocrystalline siliconmaterial, or mixing the mixed material with the coating additive, and then performing sintering. The invention further discloses an application of the graded high-nickel ternary anode material in lithium batteries. The graded material prepared by the method provided by the invention has higher compaction and cycle stability than the single polycrystalline material, has higher capacity than the single monocrystalline silicon, and the gas production and service life problems of the battery can be effectively improved after the grading modification.