The invention relates to an aluminum alloy brake disc, and in particular relates to a carbon fiber reinforced aluminum base composite material for the brake disc and a preparation method of the composite material. The carbon fiber reinforced aluminum base composite material for the brake disc is prepared by taking an aluminum-silicon-copper series aluminum alloy as a matrix and micro-nano scale carbon fibers as a reinforcing phase of the aluminum alloy matrix, and performing melt synthesis-compression molding. Compared with the prior art, through carbon fiber reinforcement, the fatigue resistance and wear resistance of the material are improved, and the material is good in braking effect and long in service life and can be applied to brake discs of various motor vehicles.