In this paper, the hydrotalcite with positive charge was obtained by stripping the nitrate hydrotalcite, then a layer of Cl ^- was adsorbed to form electric double layer nanomaterials. The samples were characterized by XRD, HRTEM and FT-IR and used in anticorrosion coatings. The corrosion resistance of the coating was studied by SEM, polarization curve and nyquist curves technology. The results show that this kind of electric double layer nanomaterials can greatly improve the corrosion resistance of the layer, and the corrosion potential can be increased from -0.9 V to -0.5V, which has a good application prospect.