At present, the anti-corrosion protection measures of bridge concrete are not perfect in our country. The reinforced concrete structures is far from reaching the expected design life due to the lack of necessary protective measures. Elastic coating is a new material which has been developed rapidly in recent years. It has a certain amount of elongation and can satisfy the expansion and contraction of concrete. Compared with common coatings, elastic coatings can work better with concrete to avoid failure of anti-corrosion coating as a result of the tensile crack of coating surface caused by thermal expansion and cold contraction of concrete. The purpose of this project is to explore the anti-corrosion effect and long-term performance of elastic coating on the surface of arch seat of Mingzhou Bridge, and to provide certain reference for other mass concrete engineering anti-corrosion coating.