To solve the problem of tilting of gravity lock chamber wall，we carry out the techno-economic comparison among several reinforcement schemes taking a lock project as an example，and adopt the finite element method to study the influence law of design parameters of the recommended schemes. The result shows that the pre-stressed soil anchor reinforcement scheme is economical in cost and has little influence on the surrounding environment，the tensile force of the anchor cable is less sensitive to the influence of the gravity lock chamber structure，and the wall stress is less at about 2/3 height of the wall. When the distance between the anchor cables is large，the soil mass between the anchor cables will appear certain tensile stress. Rational design of pre-stressed soil anchor parameters can effectively control wall and soil stress，and obtain good reinforcement effect. This method can be used not only in ship lock overhaul project but also in the reinforcement and reconstruction of sluice，box culvert and other similar hydraulic structures.