Waterborne epoxy zinc-rich coating with low film thickness and high anticorrosion were prepared by studying waterborne epoxy dispersion,modified amine hardener,zinc powder content and particle size,type and amount of anti-flash rust agent and so on.The results showed that the self-stability of waterborne epoxy dispersion and zinc-rich collocation stability were very important,800 mesh zinc powder was selected,and the content of zinc powder accounts for 80%of the whole paint film,which had the best anticorrosion performance.Screening to solve the problem of flashover rust without affecting the salt spray resistant anti-flashover rust agent,adding 0.3%in the coating,the coating comprehensive performance was the best.