The present invention discloses a sponge-like silicon graphene and carbon nano-tube composite negative electrode material preparation method, which comprises, by weight, 50-90% of silicon powder, 2-35% of graphene, and 1-25% of carbon nano-tubes. According to the present invention, the composite material prepared by using the freeze-drying or supercritical drying method retains the original skeleton structure, the carbon nano-tubes are adopted as the skeleton support unit and the graphene is adopted as the frame pore structure surface to co-support the three-dimensional electric conduction network composite structure having innumerable pores, and the silicon powder is adsorbed inside the pores; the composite material has characteristics of high conductivity, high structure elasticity, strong adsorption, effective inhibition of the volume expansion effect of the silicon during the charge and discharge process, and improvement of the cycle stability of the material; and the process is simple and environmental protection, and is suitable for industrial production.