In view of sudden geological change during the ship lock construction,this paper carries out the analysis and in-depth study combining with the engineering example.This paper analyzes the solution mechanism,solves the shortage of foundation bearing capacity casued geological catastrophe by optimizing the superstructure and improving the foundation bearing capacity,determines the solution of shallow foundation replacement with empty box wall as the recommended solution through the comparison and analysis of multiple solutions,and calculates the load and displacement of the solution.The results show that the solution can adjust the gravity and center of gravity of the structure by adjusting the internal filler,and can flexibly adapt to a wide range of foundation conditions.