In order to study the seismic responses of UHV transmission tower structures and tower-conductor coupling system, shaking table test on the coupling system is needed. Scaled model design method for the UHV transmission tower 8-bundled conductors with strong geometrical nonlinearity is put forward in this paper. Based on the requirement for the design of steel tubular tower, a scaled tower model was design following the elastic similitude relationship. Due to the dimensional limitation of the shaking table and in order to simulate the large cross-sectional 8-bundled conductors with long spans which show strong geometrical nonlinearity, separated dynamic parameter scale ratios for the two parts were used independently in the designing of the system. Inertia mass similarity and dynamic property similarity were simultaneously used to determine the mass and the sag of the 8-bundled conductors, respectively. The material selection, dynamic similarity relations, boundary condition，and detailed design of the UHV transmission tower- conductor coupling system for shaking table model are introduced. The similarity method applied in the coupling system provides a reference method to the scaled shaking table test for the structures with geometric nonlinear characteristic.