Abstract: According to the problem that the round foundation pit needs to be supported quickly and efficiently during the rescue of the transmission tower, the efficiency and safety of the rescue is improved.An assembled retaining wall structure and assembly methods for the round foundation pit of the tower is designed.The assembled retaining wall stress and stability calculation method for the design of the retaining wall is proposed, and the finite element numerical test is also used to mutually verify the rationality of the retaining wall design method and the numerical calculation model, and the main and secondary factors affecting the retaining wall stress are analyzed based on a reasonable numerical calculation model.The results show that the theoretical calculation value of the retaining wall stress is similar to the finite element calculation result under two typical working conditions, the bearing capacity and stability requirements are satisfied.The relative error of the two results is-0.22%～1.96%,which verifies that the theoretical design method and the finite element calculation model are effective and reasonable.In addition, the depth and diameter of the foundation pit are the main factors affecting the stress of the retaining wall, followed by different soil types.Relative to cohesion and internal friction angle, the soil gravity has the the greatest influence of affecting retaining wall stress on mechanical parameter.