Abstract: In order to develop a new way of efficient utilization of corrosion inhibitors, a corrosion inhibited poly(o-toluidine)-graphene oxide-based anticorrosive materials was prepared by using graphene oxide as the substrate, poly(o-toluidine) microcapsules as the wall material and 2-mercaptobenzothiazole as the corrosion inhibitor as the core material, and it was used as the filler for the modification of waterborne epoxy resin coating (WEP). The structure and morphology of the coating were characterized by FTIR, XRD, XPS and SEM. The release behavior of the corrosion inhibitor was analyzed by UV-Vis spectroscopy. The tensile property and anti-corrosion properties of the coating were evaluated by universal testing machine, electrochemical test and salt spray test. The results show that the corrosion inhibitor is successfully coated inside poly(o-toluidine) microcapsules, and the microcapsules are connected to the surface of the modified graphene oxide by covalent bond, so that the corrosion inhibitor is fully utilized, and the tensile property, self-healing properties and shielding properties of the coating against corrosive media are improved. UV-vis spectrum test results show that the release of corrosion inhibitor in microcapsules reaches 78% after 96 h of artificial damage. The tensile property test results show that, compared with pure WEP, the coating stress increases from 14.281 MPa to 24.25 MPa when the filler content is 0.3wt%. SEM results show that the scratched coating self-healing after 10 h at room temperature. The electrochemical test and salt spray test results show that the corrosion potential of the coating increases from −0.6216 V to −0.1554 V, the corrosion current density decreases from 4.271×10⁻⁷ A·cm⁻² to 1.016×10⁻¹¹ A·cm⁻², and the impedance modulus can reach 1.5757×10⁹ Ω·cm². After 500 h of salt spray, the corrosion resistance is still good.