The invention relates to a method for preparing an anode material of coated spinel lithium-rich lithium manganate. The method comprises the following steps: mixing spinel lithium-rich lithium manganate powder with alumina, aluminum hydroxide, aluminum chloride, zinc oxide, zinc hydroxide or zinc chloride powder according to a weight ratio of 1:0.001 to 0.15, and adding a wet grinding medium; preparing a precursor 2 by wet grinding and drying steps; sintering the precursor 2 at any temperature in a temperature interval of 250-360 DEG C to prepare the coated spinel lithium-rich lithium manganate. According to the invention, the costs of the raw materials are relatively low, and the prepared electrode material has excellent high current discharge performance after being stored, thereby laying a good foundation for industrialization.