Abstract: In order to effectively reduce the operational safety risk of the wading projects and improve the monitoring and early warning system of the Yangtze River water disaster, a riverbed monitoring and early warning analysis platform for important wading projects based on B/S architecture was designed and developed. The three-dimensional simulation modeling of the wading project, dynamic generation of the riverbed and the visual simulation display were realized. The riverbed monitoring and early warning analysis functions such as riverbed erosion and deposition analysis, evolution animation simulation, contour line change analysis, custom section analysis, river slope ratio calculation, and riverbed deepest point statistical early warning analysis were modularly designed and successfully applied to the riverbed monitoring of Dashengguan Yangtze River Bridge in Nanjing City. The practice showed that this platform can quickly and intuitively analyzed the evolution process of local riverbed scouring and silting in wading projects, and had automatic warning function, which provided technical support for scientific management, hidden danger investigation and safety maintenance of riverbed monitoring in important wading projects along the river.