Rectangular pipe combined special-shaped column

The utility model discloses a rectangular pipe combined special-shaped column which comprises a first rectangular pipe and a second rectangular pipe, and the second rectangular pipe is arranged on the right side of the first rectangular pipe. According to the rectangular pipe combined special-shaped column, when the special-shaped columns are combined, a first rectangular pipe, a second rectangular pipe and a third rectangular pipe can be flatly placed on the ground, and then connecting bolts penetrate through mounting holes in the first rectangular pipe, the second rectangular pipe and the third rectangular pipe correspondingly in the two ends of the first rectangular pipe; according to the special-shaped column, the connecting bolts are arranged on the two ends of the third rectangular pipe, the mounting nuts are screwed into the connecting bolts from the interiors of the two ends of the third rectangular pipe, the rectangular pipes can be combined and fixed into the special-shaped column after screwing, an