Abstract: Graphene reinforced Al matrix composites are considered to be potentially high-strength Al tough materials with promising applications, which have a wide application prospect. Graphene/aluminum（G/Al） composites were prepared by accumulative roll bonding（ARB）. The effects of ARB passes and graphene on the microstructure, mechanical properties at room temperature, and fracture morphology of the composite were studied by optical microscope（OM）, electronic universal testing machine, scanning electron microscope（SEM）. The results show that the increase of ARB passes is beneficial to the interface bonding, and make the thickness thin and the uniformity increases of unit area distribution（layer distribution） of graphene layer in G/Al composite. The mechanical properties of G/Al composites are greatly affected by the ARB pass and graphene. The lateral hardness and strength of G/Al composite are higher than that of Al/Al composite due to the reinforcement of graphene, but the elongation is lower. The rate of increase in hardness and strength of G/Al composites increases compared with Al/Al composites, while the rate of decrease in elongation reduces, and the enhanced plasticizing effect of graphene on Al-based composites become more apparent with the increase of ARB passes.