In order to study the influence of ship lock deep foundation pit excavation in the stress of bridge pile on the slope,the geotechnical centrifuge model test was carried out.The results showed that the deeper the foundation pit excavation was,the greater the difference of soil pressure between the two sides of the pile was,and the horizontal displacement of pile top also increased.ABAQUS finite element software was used for numerical simulation analysis,and the calculation results showed that the horizontal displacement of the bridge pile towards the direction of the foundation pit was generated in the excavation process.The tensile force of the right pile was becoming more and more obvious,and the pile stress and bending moment were becoming larger and larger.The maximum tensile stress reached 3.61 MPa,which was greater than the standard tensile strength of pile concrete.Upper soil mass on the right side of the excavated pile was pressed at the foot of the slope,and the reinforcement measures of pile row support were taken.Good reinforcement effect was obtained.