Based on Baliwan lock head project on the east route of South-to-North Water Transfer Project，we carry out a centrifugal model test and get the structural deformation and ground reaction force at the end of construction period.According to the scale model of centrifugal test established lock head，we build the finite element analysis model.Using the back analysis method we develop the soil deformation modulus values and conduct the finite element analysis.Comparing the results with those by the centrifugal model test,we get the most reasonable soil index of soil indicators in the model of finite element calculation，to provide a theoretical reference for the engineering design under the same geologic conditions.