Double-layer metal roof mounting structure

The utility model relates to a double-layer metal roof installation structure, and belongs to the technical field of metal roof installation, the double-layer metal roof installation structure comprises metal decoration plates and a metal waterproof plate, the metal waterproof plate is installed on a main body steel structure, a plurality of metal decoration plates are arranged on the metal waterproof plate after being spliced, keels are installed below the metal decoration plates, and the keels are connected with the main body steel structure. A plurality of fixing seats are installed on the metal waterproof plate in an array mode, connecting mechanisms are arranged below the fixing seats and the metal decorative plate, the connecting mechanisms correspond to the fixing seats in a one-to-one mode, the connecting mechanisms can be replaced according to the needed height, one ends of the connecting mechanisms are connected with the metal decorative plate, and the other ends of the connecting mechanisms are con