The application of double-pile in foreshore soft foundation is studied.Based on the elastic link finite element theory,the finite element software ANSYS is used to simulate the mechanical characteristics of double-pile under different conditions,and the influence on the displacements and internal forces of the double-pile stiffness and penetration depth.Results show that the double-pile is pretty well applied to the foreshore soft foundation.The penetration has great impact on the stability of structure.The increasing of the stiffness can reduce the horizontal displacement to some extent,but when the pile diameter reaches a certain critical threshold,double-pile appears rigid body motion which is not fit for the bearing capacity of soft foundation.