The ship lock is composed of multiple parts,including upper and lower approach channels,upper and lower lock heads,lock chambers,and water conveyance systems.In view of the complexity of the structure composition of the ship lock and the stress situation during its operation,the construction safety and operational stability of hydraulic structures of the ship lock are important.This paper summarizes the monitoring data during the construction period of the Longxikou ship lock,combines it with the actual situation on site,and uses qualitative conventional analysis and quantitative numerical calculation to analyze the changes and development trends of various monitored physical quantities.The results show that:1) During the construction period,the seepage pressure of the ship lock base is affected by the river water outside the cofferdam,the groundwater on the bank slope,and the construction water in the foundation pit;2) the backfill pressure behind the ship lock wall is influenced by the depth of the fill and its internal moisture content;3) the internal stress and strain of concrete are mainly related to temperature control.