External hanging curtain wall noise reduction structure

The utility model discloses an externally-hung curtain wall noise reduction structure which comprises an outer wall and a supporting frame, the inner side of the supporting frame is fixedly connected with a tightening mechanism, and the tightening mechanism comprises a bearing frame fixedly connected to the outer surface of the outer wall. When the noise reduction device is used, firstly, the partition plate, the noise reduction cotton layer and the rubber plate are all placed in the bearing frame, the position of the partition plate is fixed through the fixing plate, then the threaded rod is rotated, so that the position of the partition plate is further limited and clamped through the first limiting plate, meanwhile, the second limiting plate rotates synchronously, the noise reduction cotton layer is clamped, and the noise reduction cotton layer is fixed through the rubber plate. And a third limiting plate fixes the position of a rubber plate, so that a partition plate, a silencing cotton layer and the rubb