The invention discloses a lithium ion battery cathode plate. The lithium ion battery cathode plate comprises a cathode current collector and a cathode active material layer, wherein the cathode active material layer is distributed on the cathode current collector and contains a cathode active material, a conductive agent, an adhesive agent and a lithium compound; the lithium compound is decomposed to release lithium and gas in the formation and charging processes of a lithium ion battery. The lithium compound serves as a lithium supplementation material, a cathode potential is unchanged, the lithium compound is decomposed only in the formation and charging processes, the gas generated by decomposition can be removed in the formation process, the lithium generated by decomposition is transferred from a cathode to an anode in the charging process, a solid electrolyte inter-phase (SEI) membrane is formed on the anode, and the lithium required by forming of the SEI membrane is supplemented. Therefore, the consumption of cathode lithium ions can be reduced, the irreversible capacity of the lithium ion battery is reduced, and the cycle performance of the lithium ion battery is improved. The invention also discloses the lithium ion battery with the lithium ion battery cathode plate and a preparation method of the lithium ion battery.