Traditional methods to enhancing mechanical strength of metallic materials would result in the inverse effect on the conductivity and how to prevent this inversed relationship between strength and conductivity has been a long-known problem, especially for electrically conductive materials. Here we report a strategy that utilize copper coated graphene as reinforcement, concurrently enhancing both the mechanical strength and electrical conductivity of aluminum matrix. Copper coated graphene reinforced composites were fabricated through a sequence of procedures involving chemical deposition, ball milling, and vacuum hot-pressing sintering processes. Copper coating on graphene not only avoids graphene from agglomeration but also prevents the development of degraded Al 4 C 3 phase as well as increasing the interface bonding and the electrical contact between reinforcements and the matrix. The composite possesses an ultimate tensile strength of 242 MPa and a conductivity of 34.5 MS/m, respectively, with introducing 0.5 vol% graphene, which is around 102% and 8.15% higher than the corresponding values for pure aluminum manufactured under the same circumstances. Compared to other routine methods, this approach effectively tackles the enduring challenge of reconciling the trade-off between strength and electrical conductivity in metallic materials. • Graphene aluminum composites is processed using chemical deposition and ball milling and hot-pressing. • The tensile strength and conductivity of 0.5 vol% graphene aluminum composites are 242 MPa and 34.5 MS/m. • A simultaneous enhancement in strength and conductivity is achieved in aluminum matrix. • The strengthening mechanism of graphene aluminum composites was investigated analyzed. [ABSTRACT FROM AUTHOR]