The invention relates to a method for performance of a highly-dispersed graphene-modified ion-doped Ni-Co-Mn ternary material. The method is characterized by comprising the steps of mixing graphene powder and an active agent, and performing mixing, washing and filtering to obtain intercalation graphene; adding a wet grinding medium and mixing an ion-doped ternary material; and preparing the highly-dispersed graphene-modified ion-doped Ni-Co-Mn ternary material by steps of drying, cooling and sintering, wherein the doping ions are sodium ions, potassium ions, magnesium ions, calcium ions, strontium ions, aluminum ions, gallium ions, titanium ions or zinc ions. The method has the advantages of relatively low raw material cost, wide raw material source, simple preparation process and less consumed time, and is simple and convenient to operate; and compared with a co-precipitation method, the method has the advantages that waste water discharged during the preparation process is obviouslyreduced, a LiMn6 superlattice structure does not exist in the prepared sample, the prepared electrode material is good in consistency and uniform in constituent, has excellent discharging performanceand excellent cycle property particularly under discharge in a large-current condition, and a favorable foundation is laid for industrialization.