The invention provides a preparation method for micron-nanometer two-scale TiC particle reinforced aluminum matrix composites and relates to a preparation method for aluminum matrix composites, in particular to the preparation method for the additional micron-scale TiC particle and in-situ synthesis nanometer-scale TiC particle two-scale reinforced aluminum matrix composites. According to the preparation method, the mechanical property and friction and abrasion properties of the particle reinforced aluminum matrix composites can be further improved. The preparation method comprises the following steps that (1) micron-scale TiC powder, C powder and Ti powder are subjected to ball-milling to be mixed uniformly and made into a precast block; (2) an aluminum alloy melt is melted, and the temperature of the melt rises above 850 DEG C; (3) the prepared precast block is added to the aluminum alloy melt, the temperature of the melt is kept above 850 DEG C for more than 30 min, simple mechanical agitation is conducted during the heat preserving process, and then a composite melt is obtained; and (4) the composite melt is subjected to casting moulding, and the micron-nanometer two-scale TiC particle reinforced aluminum matrix composites are obtained after solidification.