Novel back arris for reinforcing concrete column

The utility model discloses a novel back arris for reinforcing a concrete column, which relates to the field of buildings and comprises a plurality of first square tubes and second square tubes, a plurality of connecting plates are mounted between the first square tubes and the second square tubes, inclined blocks are mounted at the tops of the first square tubes and the second square tubes, and the inclined blocks are connected with the first square tubes and the second square tubes. A plurality of connecting pipes are installed in the first square pipe and the second square pipe, and a positioning pin is arranged between every two inclined blocks. The connecting pipes are arranged in the first square pipes and the second square pipes so as to improve the strength of the first square pipes and the second square pipes, meanwhile, the connecting pipes play a role in transmitting loads, the first square pipes and the second square pipes are made into trusses, the bending resistance of the trusses can be improve