The construction of ship lock relates to deep foundation pit excavation and foundation pit dewatering work.Taking the Gaoliangjian ship lock,Baoying ship lock in Yangzhou,and Yundong ship lock in Gaoyou as examples,the excavation and seepage are described respectively.The reasons,advantages and disadvantages when choosing the support type are introduced in detail according to the geographical conditions and the characteristics of the ship locks.In the future,the appropriate foundation pit support and seepage control scheme can be selected according to geological conditions,different geographical conditions,construction periods and safety grades.