Objective To improve the dispersion of zinc in zinc-rich coating. Methods The high dispersed zinc slurry was prepared by zinc powder and dispersant, which was obtained by the reaction between KH550 and epoxy under sanded conditions. The part A of zinc-rich coating was first prepared by mixing bentonite and aerosol in dimethylbenzene and butanol under high stirring conditions, then the prior prepared zinc slurry and other auxiliary agents were added and stirred. Part B of zinc-rich coating was polyamide 650 dissolved in mixed solvents. Part A and B were finally mixed to make the coating. Results Comparing the properties of the coatings with or without the dispersant, we found that the adhesion changed from level 2 to level 1 , flexibility decreased from 3 mm to 2 mm, shock resistant increased from 30 kg·cm to 50 kg ·cm, and the electrochemical impedance was doubled. Conclusion The coating prepared by high dispersed zinc-rich paint showed good comprehensive properties.