The flow condition at the navigation wall of high-lift lock is complicated,and there are some problems such as berthing and safety of mooring facilities for large ships.Taking the berthing conditions of the navigation wall of Gezhouba No.2 ship lock as an example,this paper analyzes the water filling and discharging of the ship lock under different working heads through model test and mooring force test，studies the berthing conditions and change laws of ships in different berthing positions of the upstream and downstream navigation walls during the opening and closing of the lock herringbone gate,and puts forward countermeasures for ship mooring force exceeding the design value.The results show that the mooring conditions of the upstream navigation wall are good and the mooring force of the ship is low.The downstream navigation wall is greatly affected by the discharge of lock water and is closely related to the working head of lock water,and the berthing conditions are poor.Measures such as optimizing the operation of lock valve and discharge process,avoiding the influence range of the lock water discharge,and increasing the number of ship mooring lines can be taken to reduce the mooring force of a single mooring post.The mooring facilities and the berthing conditions of the downstream navigation wall are expected to meet the requirements.