Abstract: Graphene has excellent mechanical properties, thermal properties and electrical conductivity, and is considered to be an ideal reinforcement phase for composite materials. Graphene used to strengthen aluminum matrix composites has great research and application value. The research on the strengthening and toughening mechanism of graphene-reinforced aluminum-matrix composites was first introduced, and the research progress on the preparation technology of graphene/aluminum composites such as liquid method, solid method and additive manufacturing was reviewed.The dispersion method, effect and forming process characteristics of each preparation technology were analyzed. Finally, the development trend of graphene-reinforced aluminum-matrix composites was prospected.