The invention discloses a method for preparing a lead-graphene composite material. The method comprises the following steps: dispersing graphene nanometer sheets into anhydrous alcohol and ultrasonically vibrating to obtain a black graphene solution, adding compliant lead metal powder into the graphene solution, encapsulating anhydrous alcohol and a lead-based composite material containing the graphene nanometer sheets into a ball milling tank for ball milling and mixing, thoroughly drying the ball milled slurry, and finally compacting the dried powder and sintering, wherein the sintered composite can be used as an additive alloy for preparing the lead-graphene composite material or directly used after corresponding ageing. The method disclosed by the invention can be used for not only solving the problems that a homogenous composite material cannot be prepared from carbon material and lead metal due to large difference in density and chemical properties, further achieving good bonding of lead particles and graphene, and greatly increasing the contact interface of lead and graphene to make dilution and remelting of the lead-based graphene composite material possible.