The invention relates to the technical field of antirust paint for steel structures and particularly discloses antirust primer and finishing paint for a steel structure. The primer comprises a component A and a component B, the component A contains epoxy resin, anticorrosive filler and graphene; the component B contains an epoxy curing agent; the anticorrosive filler comprises a mixture of a rareearth material, composite iron titanium powder, zinc powder and aluminum powder, wherein the particle size of the composite iron titanium powder is greater than or equal to that of the zinc powder, the particle size of the zinc powder is greater than or equal to that of the aluminum powder, and the particle size of the aluminum powder is greater than that of the rare earth material. The finishingpaint contains materials such as fluororesin. Through combined use of the primer and the finishing paint, not only are good anti-corrosion performance and good anti-aging performance achieved, but also a high adhesion force is achieved.