Abstract: The disclosure relates to the technical field of coating anti-corrosion, in particular to an additive with synergy, self-repairing, anti-corrosion and its application. The additive includes hydrotalcite containing exchangeable anions and zeolite containing exchangeable cations. Compared with the prior art, the present disclosure has both cation and anion exchange performance. When the corrosive electrolyte enters the coating film, it is in contact with the corrosion-resistant additive, and the corrosive ions (such as chloride ions or sodium ions) are adsorbed during the process of penetrating into the coating, and the corresponding anti-corrosion anions and cations are released, precipitated in the coating to close the gaps of the coating, or transferred to the metal substrate to form a protective layer, thereby acting as a barrier to protect the substrate and enhance the adhesion of the coating. Its anti-rust effect is obvious, and it can replace the anti-rust pigment containing lead or chromium.