Abstract: The domestic and foreign researchers paid more attention to the uplift capacity than to the deformation of the base-enlarged tension piles.A highly effective iterative procedure was developed to examine the load-displacement behaviour of base-enlarged tension piles by the load transfer theory.The nonlinear relation between the reaction force and the displacement of tension piles was simulated by the hyperbola function.Compared with the load-settlement responses of the model test and in-situ pile test results,this method could give reasonable results.