Abstract: The technology research status quo of anti-contamination external coating material is briefly introduced. The authors analyze the impact of contamination resistivity of external coating material on the heat radiation of "white color type" coating layer of product oil storage tank. The experiment results on the anti-contamination external coating material in selection of raw material, batch formula and property testing are provided, and the influence of different resins, colorant ratios and solvents on the contamination resistivity is deeply discussed in this paper.