Glycidyl methacrylate (PGMA) was synthesized by radical polymerization of glycidyl methacrylate (GMA); Using lysine (Ly) as a bridge, graphene oxide (GO) was connected with PGMA, and PGMA microspheres (PLGO) coated with graphene oxide were synthesized for the preparation of waterborne epoxy composite coatings. The structure of the product was confirmed by FTIR, XPS, XRD and SEM. GO successfully wrapped PGMA microspheres; The corrosion resistance of waterborne epoxy coating was measured by electrochemical and salt spray experiments. The results show that when 0.3wt% plgo is added (the amount is based on the total mass of epoxy resin and curing agent, the same below), the waterborne epoxy anti-corrosion coating has the best corrosion resistance, and the corrosion inhibition efficiency can reach 86.46%. Compared with pure EP, the corrosion current density is reduced from 2478.75nA·cm-2 to 335.46nA·cm-2, the corrosion voltage is increased from -0.88V to -0.53V, and the low-frequency impedance value is increased by about 4 orders of magnitude.