The utility model belongs to the technical field of flexible structure design, and particularly relates to a height-variable supporting
column structure which comprises a shell, a series butterfly-shaped flexible device and a driving device. The shell is in a regular hexagon shape, the interior of the shell is of a hollow structure, the top of the shell is open, the series butterfly-shaped flexible device and the driving device are both arranged in the shell, the series butterfly-shaped flexible device comprises multiple sets of flexible plates stacked up and down, round holes are formed in the centers of the flexible plates, and the flexible plates and the shell are coaxially arranged; the driving device and the shell are coaxially arranged; when the height of the supporting column needs to be adjusted, the driving device drives the multiple sections of column bodies to slide up and down, meanwhile, the flexible plate stretches or contracts under the elastic force of the flexible plate, and therefore height adjustment of the supporting column is achieved, the structure is simple, and control is stable. Meanwhile, in the process of changing the height, the height-variable supporting column has enough lateral rigidity to
resist lateral load and torque load, and the process is simple and easy to implement.