Steel column butt joint supporting frame and steel column butt joint construction method

The invention relates to a steel column butt joint supporting frame and a steel column butt joint construction method. According to the main technical scheme, the steel column butt joint supporting frame comprises a flat plate and four frame bodies, wherein the flat plate is fixedly installed at upper end openings of lower steel columns, the four frame bodies are located in an inner cavity of a square steel column, the lower parts of the frame bodies abut against the upper surface of the flat plate, the parts, which are located at the center line of the steel column, of the frame bodies abut against each other, upper elastic telescopic pieces and lower elastic telescopic pieces are arranged on the parts, away from the center line of the steel column, of the frame bodies, the elastic extension directions of the upper elastic telescopic pieces and the lower elastic telescopic pieces are the directions away from the center line of the steel column, the upper elastic telescopic pieces are matched with inserting h