The core of Al Mg Mn master standing seam roof system is composed of metal plate, special shape standing seam occlusion based on design, this design is mainly for large span self support type seal installation system. No perforation in the roof, because the support way is hidden in the panel below. Connection mode of roof plate is made of aluminum alloy fixed bearing its unique, plate and its standing seam occlusion formed close connection, this process of plate occlusion without manpower, entirely by the machine automatically, and the connection mode of occluding edges and bearing formation can solve the generated due to thermal expansion and contraction of the plate stress, the the advantage is reflected in the production of longitudinal long size plate but not by force deformation. At the same time the roofing system complete accessories supply can meet the needs of various architectural form