Since the impoundment of Three Gorges reservoir,water and sediment to the downstream reach has changed,resulting in the process of river transformation on the Changjiang-Lujiahe river and erosion of the bed.Based on the latest prototype observation data of the reach after construction of the Gorges project,we analyze the changes about imported shoal of Shahong and the waterway conditions,and propose the development mechanism of the imported shallow of Shahong and the impact of the regularity on the waterway conditions.We also predict the trend of the bed evolution of the imported shallow and the waterway conditions,and consider that the waterway conditions maybe further decline under the natural role.The research result may serve as reference for the channel regulation ideas and engineering design in the project.