Joint structure of steel pipe column and steel pipe column jointed by the same

The invention provides a joint structure of a steel pipe column and a steel pipe column jointed by the joint structure. The structure thereof is simple, which is convenient for construction, thereby reducing the cost and shortening the working period. A lower steel pipe (2a) and an upper steel pipe (2b) are provided. The lower steel pipe is provided with a support underplate (4) at the place having a distance of a determined depth from the upper end part; multiple first anti-malposition shift ribs (5) at basically equal intervals in the circumference direction of the inner wall close to the upper end part are arranged; the diameter of the upper steel pipe is smaller that that of the lower steel pipe; a support underplate (4) is arranged at the place having a distance of a determined depth from the upper end part; multiple second anti-malposition shift ribs (5a) at basically equal intervals in the circumference direction of the inner wall close to the upper end part are arranged; multiple third anti-malpositio