The work aims to improve the poor compatibility between organic coating and inorganic corrosion inhibitor, and realize the controlled release of corrosion inhibitor with the aim of improving protective property of organic coating. Magnesium aluminum hydrotalcite loaded with molybdate was synthesized by co-precipitation method. And the as-prepared hydrotalcite was modified by silane coupling agent KH560 to improve dispersion of pigments. The XRD and FTIR spectral analysis showed that the interlayer distance of hydrotalcite has been magnified, indicating that the molybdate has been inserted into the layers of hydrotalcite successfully, and silane coupling agent KH560 has been grafted to surface of as-prepared hydrotalcite. As KH560 modified filler was incorporated into epoxy zinc-rich paint, the adhesion and flexibility of coating show no obvious degradation, indicating that the filler disperse uniformly in the coating, fillers had smaller effect on mechanical properties of the coating. Furthermore, from the electrochemical impedance spectroscopy (EIS) we can conclude that the corrosion resistance of zinc-rich paint can be enhanced by adding the filler by studying corrosion behaviors of coatings with filler and without filler in NaCl solution.