The invention provides a roof panel which comprises a truss structure (C type
steel frame structure), an upper
bearing surface layer, a lower
bearing surface layer and a heat preservation filling layer, wherein the heat preservation filling layer is the middle layer inside the truss structure (C type
steel frame structure) of the roof panel, and the upper surface and the lower surface of the truss structure (C type
steel frame structure) are connected with
bearing surface layers; the bearing surface
layers comprise glass fibers, reinforced materials, composite
layers containing
magnesium and padding, the upper layers and the lower layers of the bearing surface layers are the glass fibers, and a layer of reinforced materials are arranged on the lower layer glass fibers of the upper bearing
surface layer; the composite containing
magnesium and the padding are arranged in the middle layer, and the glass fibers and the reinforced materials are combined into a composite through viscidity of the composite containing
magnesium. According to the roof panel, the truss structure (C type steel frame structure) is simple; the cold bridge and waterproof problems of the structure of the roof panel are solved through the upper bearing
surface layer and the lower bearing
surface layer; the bearing surface layers can be prefabricated in factories, field
forging is not needed, and therefore the construction processes of the roof panel are simplified, and the quality is easy to control. A truss can be assembled in the field, and therefore
transportation cost is saved, and production, installation and construction are convenient to conduct.