The invention provides a high performance lithium ion battery anode material lithium manganate and a preparation method of the material. The lithium manganate is a doped lithium manganate LiMn2-yXy04 which is doped with one kind or a plurality of other metal elements X, wherein X element is at least one kind selected form the group of aluminium, lithium, fluorine, silver, copper, chromium, zinc, titanium, bismuth, germanium, gallium, zirconium, stannum, silicon, cobalt, nickel, vanadium, magnesium, calcium, strontium, barium and rare earth elements lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, and y is larger than 0 but less than or equal to 0.11. The lithium ion battery anode material lithium manganate provided in the invention has extraordinary charge and discharge cycle performance both in the environments of normal temperature and high temperature. According to the invention, the preparation method of the material is a solid phase method, the operation is simple and controllable and the cost is low so that it is easy to realize large-scale productions.