The invention belongs to the technical field of polymer material sealants, and relates to a graphene-nickel composite conductive anticorrosion polysulfide sealant. The polysulfide sealant includes a component A that is base paste and a component B that is vulcanization paste, wherein the component A is base paste and the component B is vulcanization paste. A graphene-nickel composite filler is adopted as a conductive agent and can allow the sealant to have a high conductivity. The sealant can have excellent corrosion resistance through adoption of the graphene. A coupling agent compositing technique is adopted to prepare the graphene-nickel composite conductive agent as a conductive filler of the sealant, a highly conductive composite material is prepared, agglomeration in a process of mixing graphene and liquid polysulfide rubber is overcome, and good dispersion and uniform distribution of the graphene in the liquid polysulfide rubber are achieved. The graphene is low in particle size, and can fill nickel powder well, thus increasing the conductive contact area. The high conductivity of the graphene is utilized, the graphene and the nickel powder form a conductive system, and the contact resistance is reduced from 0.8 to 0.03-0.01 omega.