1. The present invention relates to an anode material of a lithium-ion secondary battery and a preparation method thereof, and more particularly to an anode material of a lithium-ion secondary battery, which is a powder material made by mixing a natural graphite, an artificial graphite or both, and then mixing one or more types of resin solutions of a high hard carbon content to the mixture, and processing the mixture by a mist spray drying process and a carbonization heat treatment, and covering the mixture by a special resin material, as well as a process method of the anode material of the lithium-ion secondary battery. 2. In a preferred embodiment of the present invention, the special resin is selected from the collection of a polypyrrole, a polyaniline, a PEDOT-POSS. 3. Cycle life stability and good safe function. Application on electric vehicles, power tools, energy storage system and 3C products.