The invention relates to a preparation method for a coating type nickel doped lithium-manganese-aluminum-cobalt positive electrode material. The chemical formula of the nickel doped lithium-manganese-aluminum-cobalt positive electrode material is LiMn<1-x-y-z>AlCoNiO<2-a>Fa, wherein x is 0.27-0.3, y is 0.2-0.25, z is 0.04-0.07, and a is 0.03-0.05; and the preparation method comprises the following steps of (1) preparing the nickel doped lithium-manganese-aluminum-cobalt; (2) preparing a positive electrode active material coating liquid; and (3) coating. The positive electrode material prepared by the method is relatively high in conductivity, cycling performance and specific capacity, and relatively long in service life.