Closed flexible folding door of large -span

The utility model provides a closed flexible folding door of large -span, it relates to large -span door technical field. It contains hoisting mechanism, truss vertical column, roof truss breast truss, vertical guide rail mechanism, the interior underframe truss of door, the interior crosspiece truss of door, frame running gear, assembly pulley, guarantor apart from rope, two truss vertical columnthe upside respectively perpendicular fixed connection in the left and right sides of roof truss breast truss, the perpendicular fixed connection of underframe truss is inboard in two truss verticalcolumn's lower part in the door, the inboard of fixed connection at two truss vertical column is distinguished by two vertical guide rail mechanisms, and the position of two vertical guide rail mechanisms is corresponding, the crosspiece truss distributes from the interior crosspiece truss uniform array of the lower orientation door of roof truss breast truss respectively in a plurality of doors,and the both ends of crossp