▎ 摘　　要

NOVELTY - Preparing graphene-reinforced magnesium-based composite material comprises e.g. placing the graphene nano-sheet with zinc powder in absolute ethyl alcohol, mixing and stirring for 1-1.5 hours for primary micro-sheet processing, performing double-field control to the obtained mixed solution to obtain a graphene and zinc powder alternately arranged structure mixed solution, suction filtering, drying, subjecting the dried mixed powder to pressure infiltration and exhaust treatment to obtain a preformed block of pre-dispersed graphene and zinc powder, adding the pre-dispersed graphene and zinc powder prefabricated block into liquid magnesium alloy, heating, mechanically stirring, ultrasonically treating, casting to obtain cast graphene-reinforced magnesium-based composite material, and placing in a preheated hot pressing mold. USE - The method is useful for preparing graphene-reinforced magnesium-based composite material. ADVANTAGE - The method solves the technical problem that the nano-reinforced body in the magnesium-based composite material has a relatively large surface energy and is easily agglomerated, and the matrix wettability of graphene and magnesium is poor, and it is difficult to be added to the melt; and promotes the uniform distribution of graphene nanosheets in the magnesium alloy matrix, and the introduction of nano-reinforcers can pin the grain boundaries, suppress the growth of crystal grains and produce more lattice defects at the same time, improves the strong plasticity of the composite material under the combined action of variable diameter and direction hot pressing and graphene nanosheets.