The invention discloses a conductive carrier self-supporting flower-shaped Co3V2O8 lithium ion battery negative electrode material and preparation, and belongs to the field of preparation and application of energy materials. In the composite material, flower-shaped Co3V2O8 uniformly grows on a conductive carrier. The flower-shaped Co3V2O8 is formed by laminating at least one sheet-shaped Co3V2O8.The preparation method of the composite material comprises the following steps: step 1, taking cobalt salt and urea as raw materials, and growing at least one layer of cobalt hydroxide as a precursoron a conductive carrier in situ by using a hydrothermal method; step 2, soaking the precursor template of the conductive carrier self-supporting cobalt hydroxide into the metavanadate solution for secondary hydrothermal treatment to obtain a conductive carrier self-supporting cobalt vanadium oxide composite material; and step 3, annealing the conductive carrier of the self-supporting cobalt-vanadium oxide in air to obtain the conductive carrier self-supporting flower-shaped Co3V2O8 composite material. The method is simple and feasible, the process can be enlarged, and the method can be appliedto the field of commercial lithium ion negative electrode materials.