Sulfonated polyaniline (Spani) was synthesized from chlorosulfonic acid, aniline and ammonium persulfate. Go was reduced by polyethyleneimine (PEI) to synthesize PG composites. SPG composites were prepared by combining Spani with PG using the active site on go. Waterborne epoxy anticorrosive coatings were prepared by blending SPG with waterborne epoxy resin. The structure of SPG composites was characterized by FT-IR and XRD. The results showed that the amino group on Pei successfully combined with go, and Spani successfully increased the layer spacing of PG; The corrosion resistance of waterborne epoxy coating was measured by salt spray and electrochemical experiments, and the physical properties of the coating were analyzed. The results show that when 2wt% SPG is added (the amount is based on the total mass of epoxy resin and curing agent, the same below), the waterborne epoxy anticorrosive coating has the best corrosion resistance, and the corrosion efficiency can reach 99.19%. Compared with pure EP, the corrosion current density decreases from1080 nA?cm-2 to 307 nA?cm-2, and the corrosion voltage increases from -0.840mV to -0.347mV