Abstract: Based on the elastic theory and the overlapped-form strain mode of the soil surrounding a pile,an analytical solution for the load-displacement relationship of cast-in-situ DX pile is presented.The proposed solution can reflect the influence of the deformation of pile and non-homogeneity of soils' modulus along the depth in load-displacement relationship.The comparison with FEM analysis and full-scale test results showed that the analytical solution can well predict the displacement of pullout DX pile.The solution is simple and convenient,and can be used as a practical reference to the design of pullout DX pile.