To the rapid fluctuations of water level in the approach channel of the Three Gorges ship lift,the unreasonable selection of the docking position of the ship chamber affects the safe and efficient operation of the ship lift.This article has carried out the optimization of the ship chamber docking scheme of the Three Gorges ship lift to cope with water level fluctuations.The study proposes the establishment of a temporary berthing area for ships passing through the chamber and a method for determining the docking position of the ship chamber,achieving rapid and accurate docking between the ship chamber and the waterway.It summarizes the optimization plan for the docking of the Three Gorges ship lift cabin and verifies the changes in the impact of water level fluctuations before and after on-site verification.The results show that compared with the original plan,the optimized scheme can improve the rationality and accuracy of the docking position of the ship lift,at the same time effectively reduce the impact of water level fluctuations on the ship lift,providing a more effective docking method for safe and efficient operation of ship lifts built on natural rivers.