Aiming at the increasing navigation demand of the Xiangjiaba Hydro-project，to ensure the normal operation of the Xiangjiaba Hydro-project，we carry out continuous water and sediment monitoring in the navigable waters near Xiangjiaba from 2019 to 2021.Based on the 3-year measured topographic data and the characteristics of water and sediment in the Xiangjiaba reservoir area，we analyze the erosion and deposition changes in the navigable waters near Xiangjiaba.The results show that the Fanba wharf at the upstream of the dam is silted up，whereas the amount of siltation is not large.The Liangshuijing wharf is eroded year by year，and the erosion area is mainly located in the deep groove.The erosion in the downstream waterway of the dam is obvious.The monitoring and analysis of the port wharf and the navigable waters below the dam should be continuously strengthened to ensure the stability of wading structures and the navigation safety of vessels.