Abstract: By using the fundamental solutions of circular load applied in the interior of the half space or on the surface of the half space, the second kinds of Fredholm integral equations of pile group in saturated viscoelastic soil are established in the paper. The integral equations can be simplified by means of Laplace transforms methods. By the the numerical solution of the integral equations and the corresponding inverse integral transforms, the displacement, axial force and the shear stress of the piles groups are obtained.