The invention provides a metal lithium battery. The metal lithium battery comprises a battery cell, a positive electrode tab and a negative electrode tab, wherein the battery cell comprises a positive pole plate, a negative pole plate and a separator membrane, the positive pole plate comprises a positive current collector and a positive active material layer, the positive active material layer is arranged on a surface of the positive current collector, the material of the negative pole plate is a metal lithium thin film, the separator membrane is arranged between the positive pole plate and the negative pole plate, the positive pole plate, the separator membrane and the negative pole plate are sequentially laminated, wound or laminated and wound to form the battery cell, the positive pole plate, the separator membrane and the negative pole plate which are sequentially laminated or wound are in close contact without a gap, the positive electrode tab is arranged at one side of the battery cell and is electrically connected to the positive current collector of the positive pole plate, the negative electrode tab is arranged at one side of the battery cell, is formed integratedly with the negative pole plate and protrudes out of the negative pole plate, the metal lithium battery also comprises an electronic insulation coating layer, the electronic insulation coating layer covers one side, at the negative electrode tab, of the positive pole plate, so that the side, at the negative electrode tab, of the positive pole plate, is in electric insulation.