Large integral underground space waterproof construction structure and construction method thereof

The invention relates to a large integral underground space waterproof construction structure and a construction method thereof.The large integral underground space waterproof construction structure comprises a water stop steel plate, a plurality of welding spots are arranged on the inner side face of the water stop steel plate, the welding spots are electrically connected with conductive copper wires in an electric welding mode, welding spot protection bases are fixedly arranged outside the welding spots, and the welding spot protection bases play a role in protecting the welding spots; the welding spot protection base is sleeved with a copper wire protection tube, one end of the copper wire protection tube is connected with the welding spot protection base in an inserted mode, the copper wire protection tube plays a role in protecting and leading out a copper wire, and the copper wire protection tube penetrates through the inner side face wall body to lead out the copper wire. The welding spots and the copp