Epoxy resin coated steel bar is made from rebar or round steel as the base material, through surface rust removal, electrostatic spraying of epoxy resin powder and high-temperature curing. The coating offers excellent alkali resistance, chloride ion resistance and electrical insulation, effectively inhibiting corrosion of steel bars in concrete. It is especially suitable for marine, saline-alkali land, deicing salt and chemical corrosive environments. The product features uniform coating and strong adhesion, and can be supplied according to ASTM, ISO, GB and other standards. It is widely used in sea-crossing bridges, port terminals, tunnels, parking lots, water conservancy and marine engineering.