Steel column structure and steel column unit thereof

The utility model discloses a steel column unit, and relates to the technical field of constructional engineering, the steel column unit comprises four rectangular steel pipes and four connecting steel plates, the rectangular steel pipes are arranged in parallel, the two rectangular steel pipes are fixedly connected through the connecting steel plates, and the rectangular steel pipes and the connecting steel plates are connected in a staggered manner to form a rectangular columnar structure; according to the arrangement, the four rectangular steel pipes are connected through the connecting plates to jointly form the rectangular columnar structure, when the rectangular columnar structure is connected with a steel beam, the steel beam can be connected with the rectangular steel pipe at one corner, the node structure is simple, the steel consumption of the partition plate can be reduced, and the production cost is reduced; in addition, the inner cavity defined by the connecting steel plates and the rectangular s