▎ 摘　　要

A method of preparing Al-graphene composite with high strength and high Young modulus by taking advantage of graphene's structural characteristics was put forward. The preparation process of graphene was improved and graphene was prepared at the reducing temperature of 98 degrees C. By adding CuSO4 and then reducing colloid graphite oxide, Graphene-Cu was obtained. The addition of copper increased the density and improved the wettability between graphene and metal base. With stirring, at the temperature of 660 to 720 degrees C graphene-Cu was put in. Graphene and Al-graphene composite was prepared preliminarily, whose hardness is increased by about 40% compared to that of the pure aluminum.