The epoxy/acrylic resin blends were modified with n-octadecyl mercaptan,infrared spectroscopy,water absorption,morphology,contact angle,corrosion resistance and self-cleaning analysis of the modified paint films demonstrated that:fourier transform infrared spectroscopies reflect the cross-linking of thiols with epoxy/acrylic blends and the formation of a dense and quasi-crystalline specific arrangement orientation;When n-octadecyl mercaptan modified epoxy/acrylic resin at weight ratio of epoxy and acrylic resin=4:6,the water absorption of coating is 0.36%,and its two-dimensional morphological characterization reveals that the epoxy/acrylic resin is ordered and dense dot-like organization,and the three-dimensional profile shows a 50μm hill-like structure and a 10μm clustered papilla structure with a contact angle of 140.98°,at which time the corrosion resistance of coating is the best,its corrosion current density is 5.1054×10^(-10)A/cm^(2),and the self-cleaning ability is the strongest.