Abstract: In this paper, second order nonlinear analgsis is incre ased on the basis of refeve-nce[1]. Large displacement stiffness matrix of the eccentric space thin-walled giroler and space combinad cable element were derived. nonlinear analysis of large deflection used non-move coordinate system, so that the static contribution of elastic stiffness, geometric stiffness and large displacement stiffness can be determined Separately. Nonlinear static equations are solued by modified NewtoN-RapsoN method, Lastly, the numerical examples are given.