The substructure of frame vertical wharf in inland river hub port mostly uses steel sheathing，steel docking components，longitudinal and transverse bracing and other steel components，steel components have the advantages of high strength，good plasticity and other advantages at the same time have easy to rust，poor corrosion resistance and other problems.The hydraulic steel component rusting is a serious threat to the safety of long-term operation of the inland river hub port.In order to investigate the rusting law of hydraulic steel components in inland river hub ports under the condition of water and sand erosion，relying on a representative inland river hub port project，we carry out on-site testing for the degree of rusting of its hydraulic steel components.Through the detailed comparative analysis of the test data results of steel components with different rows，elevations and erosion directions，we reveal the spatial and temporal distribution law of the corrosion degree of different steel components，and propose an empirical rusting model of hydraulic steel components for the relying project.The results show that the rusting thickness of steel components increases with the increase of service time，but decreases with the increase of elevation.At the same elevation position，the rusting degree of components facing the water surface is more serious than that of the side water surface and the back water surface.