The invention relates to a nanometer oxide coated lithium titanate negative electrode material of a lithium battery, and a preparation method for the negative electrode material, and belongs to the technical field of negative electrode materials of lithium batteries. The negative electrode material comprises the following raw materials in percentage by weight: 1 to 10 percent of mixed oxide, 40 to 60 percent of lithium titanate, 1 to 8 percent of binder, 0.5 to 2 percent of surfactant and 20 to 57.5 percent of deionized water. The lithium titanate negative electrode material is used in combination of spherical and rodlike oxides to serve as coating particles; and the formed oxide coating has the characteristic of compact and uniform coating layer and can cover the surfaces of the lithium titanate particles well.