In the aqueous epoxy system,dispersants can cause many effects on it,not only reflected in the wetting dispersion of pigments and the anti-corrosion performance of coatings,but also affect the storage stability of coatings.Due to the complex molecular chain groups of dispersants,there are more dispersants that react with epoxy groups,which have an impact on the water resistance and storage stability of the coating.The effect of dispersants on the performance of waterborne epoxy coatings and how to choose a suitable dispersant were explored.