Auxiliary welding mechanism for butt joint of assembly type steel columns

The invention discloses an auxiliary welding mechanism for butt joint of assembled steel columns, which comprises a U-shaped connecting piece arranged on the inner side of a lower steel column, and the upper part of the connecting piece is bent inwards to form a guide section for guiding butt joint of an upper steel column during hoisting; and the welding mechanism is arranged on the guide rail and moves along the guide rail to weld the seam of the upper steel column and the lower steel column. According to the invention, through the arrangement of the connecting piece, the hoisting alignment assembly between the upper and lower steel columns can be conveniently and quickly completed, and through the arrangement of the U-shaped guide rail, the welding mechanism can be arranged on the guide rail, and the welding mechanism can automatically advance along the guide rail to weld the seam of the upper and lower steel columns; when the guide rail is in use, the output of the power unit can be transferred to the pro