The invention relates to the field of lithium batteries, and discloses a lithium ion battery negative electrode sheet containing an electric-conduction coating, and a preparation method thereof. The negative electrode sheet comprises a copper foil current collector, an electric-conduction coating and a negative electrode active material layer, wherein the negative electrode active material layer is formed by curing a negative electrode slurry, the negative electrode slurry comprises 93-95 parts of graphite, 1.5-2.5 parts of electric-conduction carbon black SP, 1-2 parts of sodium carboxymethylcellulose, 2-3 parts of styrene-butadiene rubber, and 130-150 parts of deionized water, the electric-conduction coating is formed by curing an electric-conduction slurry, and the electric-conductionslurry comprises 10-95 parts of a composite carbon source, 5-50 parts of a binder, 5-40 parts of a dispersing agent, and 450-550 parts of an organic solvent. According to the present invention, the current collector is coated with the special electric-conduction slurry layer, such that the specific surface area is large, the impedance is low, the bonding force of the electrode sheet can be substantially improved, the electric conductivity can be enhanced, the adding amounts of the binder and the electric-conduction agent can be reduced, and the energy density of the battery can be improved.