The invention relates to a preparation method for a novel lithium titanate material, and belongs to the technical field of a lithium battery material. The preparation method comprises the following steps of putting a titanium source and a lithium source into an organic solvent according to a certain molar mass, performing vacuum stirring for 6-7h and mixing uniformly; then adding a certain amount of distilling water to prepare into milk white gel; putting the gel into a reaction kettle and performing vacuumizing, and carrying out an organic solvent-hydrothermal reaction; performing washing, drying and annealing on the product to obtain sheet-shaped Li<4>Ti<5>O<12>; and next, performing coating processing on the sheet-shaped Li<4>Ti<5>O<12>, and sintering under argon protection at a temperature of 500-700 DEG C for 4-6h to finally obtain the carbon-coated sheet-shaped lithium titanate material. The lithium titanate material prepared by the preparation method has the advantages of relatively high specific energy, high rate capability and the like.