A modified super-hydrophobic material-coated high-nickel cathode material for a lithium ion battery and a preparation method therefor. The surface of the high-nickel cathode material for a lithium ion battery is coated with a modified super-hydrophobic material, and particles are bridged with each other by the modified super-hydrophobic material. The modified super-hydrophobic material is obtained by depositing a nano material on the surface of a super-hydrophobic material. By the surface modification of the super-hydrophobic material, the hydrophobic and electrolyte-philic properties and the conductivity of the super-hydrophobic material are improved. Next the modified super-hydrophobic material is coated on the surface of the particles of the high-nickel cathode material for a lithium ion battery and between the particles, in the form of a three dimensional network. Thus the surface hydrophobic conductive treatment of the high-nickel cathode material is effectively realized; reducing the reaction of environmental water with surface free lithium and side reactions of trace water and an electrolyte, and improving the safety, cycle and storage performance of the high-nickel cathode material for a lithium ion battery in batteries.