The invention provides a biphase negative electrode material Li3VO4-Li4Ti5O12 for a lithium ion secondary battery. The biphase negative electrode material comprises a Li3VO4 phase and a Li4Ti5O12 phase. The invention also provides a preparation method for the Li3VO4-Li4Ti5O12 biphase negative electrode material. According to the invention, the biphase negative electrode material with high capacity and low potential is obtained in virtue of the characteristic of high capacity of Li3VO4, structural stability of Li4Ti5O12 and excellent Li<+> transport properties; and the biphase negative electrode material has the characteristics of high capacity, high stability, security and the like.