The utility model discloses a cotton decorative board of glass, including glass cotton button board and surperficial flameresistant material layer, glass cotton button board divide into daughter board and mother board, and the mother board side is opened flutedly and the daughter board has a corresponding arch, and the recess and the protruding joint each other of primary and secondary board form public female wedge, cotton decorative board of glass further includes the profile, and some inlays the profile in daughter board and mother board, and the basal surface is stretched out to another part, and the part of stretching out the basal surface has and is used for the device fixed, and the profile is fixed in the wall with the aid of the device that this is used for fixing, then mother board and daughter board through insert be fixed in the wall body on the profile on.