The invention discloses a lithium metal negative plate with multiple protections. The lithium metal negative plate comprises a metallic lithium basal body and a protective layer, wherein the protective layer is a monolayer protective layer or a multi-layer protective layer, and the protective layer is arranged on the metallic lithium basal body; the monolayer protective layer is a lithium phosphorous oxynitride thin film protective layer; the multi-layer protective layer comprises a lithium phosphorous oxynitride thin film protective layer and a polyoxyethylene polymer electrolyte film, the polyoxyethylene polymer electrolyte film comprises a pure polyoxyethylene polymer or a mixed polylmer of a polyvinylidene fluoride-hexafluoropropylene copolymer, and the polymer electrolyte comprises a lithium salt with the concentration of 0.1 to 10 M. The lithium metal negative plate has the advantages that the lithium metal negative plate adopts a composite film of the lithium phosphorous oxynitride thin film protective layer and the polyoxyethylene polymer electrolyte film, the risk that a diaphragm is pierced by lithium dendrites can be reduced, the surface of a lithium metal cathode is protected, the cycle life of a lithium ion battery is prolonged, and the safety of the lithium ion battery is improved.