Corrosion of steel structure has always been a difficulty in the design of steel structures in offshore port areas. At present，there are few systematic studies on the anti-corrosion application of steel structures in offshore port area. Based on the reconstruction project of a automated container terminal in Dalanping，Qinzhou，this paper studies the common anti-corrosion technologies of steel structures near the port area，and analyzes the anti-corrosion principles，performance differences，anti-corrosion effects and applicable scenarios of various steel structure anti-corrosion technologies. Moreover，combined with the project，the economic and technical comparison of the coating anti-corrosion system is carried out，the technical scheme most in line with the anti-corrosion design for main steel structures near the harbor area is put forward. Through the implementation verification of the project，it is found that the adopted anti-corrosion design scheme has a good effect，which provides a reference for similar projects.