The effect of zinc-ene ratio on corrosion resistance of composite coatings of epoxy graphene zinc powder primer under natural exposure in Hainan atmosphere was studied.The experimental results showed that when the zinc-ene ratio(the volume ratio of zinc powder to graphene)was 91:9,and the volume con-centration of zinc powder was 25%,after natural exposure to Hainan atmospheric environment for four years,the width of the single side of the marking was only O.16 mm,and the SST of the single coating of the primer was more than 6000 h.