The present invention provides a particle reinforced aluminum matrix composite material and a preparation method thereof. Graphene powder and industrial pure aluminum powder are mechanically mixed, then sintered into a block to diffuse between Al and C, by pressurization during the sintering process, the wettability between graphene and an aluminum matrix is improved; at the same time, the graphene is uniformly distributed in the industrial pure aluminum powder, and the agglomeration problem can be better solved; formation of an Al4C3 brittle compound can be avoided by controlling of sinteringtemperature; the composition and the process of the particle reinforced aluminum matrix composite material are strengthened, by combination of strengthening of the composition and the process to achieve alliance between strong points, the technical problems of preparation of the particle reinforced aluminum matrix composite material in the prior art can be well solved, and testing proves that themechanical properties and electrical conductivity of the particle reinforced aluminum matrix composite material are improved.