The invention discloses a hexagonal connecting component and relates to the technical field of construction machinery. The objective of the hexagonal connecting component is to solve the problem of simultaneous installation of different specifications of vertical columns and different specifications of crossbeams. The hexagonal connecting component comprises a frame-shaped main body. The frame-shaped main body comprises a top installing face, a bottom installing face and a side installing face which is located between the top installing face and the bottom installing face. First fixing structures used for installing a first column-shaped steel structure are arranged at the top installing face and the bottom installing face separately, and second fixing structures used for installing a second column-shaped steel structure are arranged at the side installing face. The first column-shaped steel structure is greater than the second column-shaped steel structure in size. The hexagonal connecting component provided by the invention is used for setting up various kinds of crossing structures.