The invention relates to an ultrahigh-capacity lithium battery negative electrode material and a preparation process. The negative electrode material is characterized by comprising the following raw materials based on parts by weight: 18-20 parts of graphite, 0.5-0.8 part of platinum powder, 0.3-0.7 part of silicon carbide, 0.3-0.6 part of titanium dioxide, 1.3-1.8 parts of lithium carbonate, 1.2-1.5 parts of tin powder, 0.5-0.8 part of silicon dioxide, 0.3-0.6 part of ferric oxide and 0.6-1.0 part of titanium dioxide. Compared with other commercial negative electrode materials, the negative electrode material disclosed by the invention has the advantages of good cycle performance, high safety performance, stable charge-discharge platform and the like, and does not react with an electrolyte, the volume effect generated by charging and discharge is prevented, the stability of the material during the charge-discharge process is ensured, and the defects of low capacity and the like of a single lithium titanate negative electrode materials are overcome.