Ultra high voltage(UHV) latticed transmission tower-line coupling system is characterized by long-span and high-rise, and the existing experimental methods can not complete the shaking table tests. This paper designed a coupled system model consisting of three towers and two-span conductors, which took a single-circuit AC transmission project as the prototype. The material selection, the dynamic similarity relations and the design of the test plan for shaking table model of UHV transmission tower-line coupled system were introduced. To simulate the different dynamic characteristics between elastic latticed transmission tower and flexible transmission conductors and ground wires which show strong geometrical nonlinearity, separated dynamic parameter scale ratios for the two parts were used independently in the design of the system, which can solve the trouble that the span of transmission line is too long to fit within the shake table in the same proportions as the tower. Shaking table test requirements can be satisfied by comparing theoretical analysis with the actual measurements of the system model.