The re-deconstruction of the traditional inner door adopts a narrow frame aluminum profile door frame (28mm) and a very narrow (2mm) aluminum alloy profile edged wooden door leaf, which not only has the metal texture of the aluminum alloy door, but also has the decoration of the wooden door. Space provides more design aesthetics. The door body structure has a sealing system, and the door core is filled with aviation aluminum honeycomb. The sound insulation can reach 25db. The overall door thermal conductivity K ≦ 2.0w/(m2k), has excellent sound insulation and heat preservation.