Jiepai lock is located on Xinjiang waterway,thus ship lock’s reconstruction or extension is necessary in order to meet the change of navigation conditions in Xinjiang River.In view of the selection problem of gate level layout scheme,different schemes are analyzed and compared,including land expropriation,construction impact on navigation,impact on existing buildings,construction difficulty,investment,water flow conditions and so on.After analysis and comparison,the scheme of rebuilding ship lock is finally determined whose ship lock center line is 22.7 m offset to the river side from the original ship lock axis.In this paper,numerical simulation and physical model experiments are carried out to study the flow conditions in the entrance area of the approach channel to adjust the unfavorable flow conditions,and the layout requirements of hanging plates according to the flow experimental conditions are put forward.This research method can be used for reference in the selection of lock location schemes for ship lock reconstruction projects.