Large-area double-curved-surface metal panel assembly and mounting method thereof

The invention relates to a large-area double-curved-surface metal panel assembly and a mounting method thereof. The curved-surface metal panel comprises facing metal plates and a supporting keel structure, wherein the front ends of the facing metal plates are provided with inwards-concave included angles in the length direction of the facing metal plate, the rear ends of the facing metal plates form outwards-convex included angles corresponding to the inwards-concave included angles, the supporting keel structure comprises a plane keel and connecting keels, the connecting keels are connected to the two sides of the plane keel, one ends of the connecting keels are perpendicularly connected to the plane keel, and the other ends of the connecting keels on the two sides of the plane keel are fixedly connected to the facing metal plates on the two sides of the outwards-protruding included angles of the rear ends of the facing metal plates; and during installation, after a single curved surface metal panel is assem