Closed bus duct cover plate capable of being integrally laid and disassembled and closed bus duct

The utility model relates to the technical field of bus ducts, in particular to a closed bus duct cover plate capable of being integrally laid and detached and a closed bus duct, the closed bus duct cover plate is formed by sequentially and detachably connecting a plurality of cover plate single bodies, and each cover plate single body comprises a top cover plate and two side cover plates connected to the two sides of the top cover plate. The two ends of each side cover plate are each provided with a connecting column. The two connecting columns of every two adjacent cover plate single bodies are connected through a tension spring. After the plurality of cover plate single bodies are connected to form the closed bus duct cover plate, the top cover plates of the cover plate single bodies at the two ends of the closed bus duct cover plate are connected with hanging rings. The utility model has the advantages of simple installation, good sealing performance, convenient disassembly, maintenance and reassembly and