The traditional technique of repairing damaged reinforced concrete structures underwater is complex and difficult, but grouting with underwater epoxy adhesive can repair the damaged reinforced structures with small defects conveniently. There is no specialized equipment and technique for the construction due to it’s high density and viscosity. In this article, the construction technique and application of underwater grouting with epoxy underwater adhesive are introduced, to serve as a reference for the underwater repair of sea port concrete structures.