The anti-corrosion recoating and repair of steel structures in ship locks are difficult and influence the maintenance period of the ship locks. In response，this paper deeply analyzes the corrosion mechanism and anti-corrosion demand of steel structures in ship locks and outlines relevant cutting-edge technologies，materials，and processes. In addition，the paper introduces in detail the application of graphene zinc powder coating in the anti-corrosion of steel structures in ship locks. Through case application and comparative analysis，this paper compares the graphene zinc powder coating and a traditional anti-corrosion system in many aspects and concludes that the performance of the graphene zinc powder coating is much better than that of a zinc-rich epoxy coating. Graphene zinc powder coating is comparable to thermal sprayed zinc in anti-corrosion but is more convenient and environmentally friendly. As indicated by the comparison of the life-cycle economic benefits among typical anti-corrosion schemes，the graphene zinc powder coating has good performance in environmental protection，convenient implementation，and low life-cycle cost，becoming an anti-corrosion material worthy of promotion for steel structures of ship locks.