The invention discloses a method for preparing a lithium titanate electrode material coated with lithium metatitanate. The method comprises steps that (1), alcohol and a titanium source are mixed andstirred, and then cationic surfactant is added thereto to obtain a product A; (2), the lithium source is dissolved in the water to obtain a B product; (3), the product A is added to the product B to obtain a precursor solution C product; after the product C is dried, and a precursor powder D product is obtained; (4), the D is calcined under the protective atmosphere and then annealed under the airto obtain the lithium titanate negative electrode material coated with lithium metatitanate. The method is advantaged in that the prepared lithium titanate negative electrode material has high capacity at large magnification, and good cycle stability is achieved.