The invention discloses a high-efficiency and energy-saving long-distance heat supply network conveying method. According to the method, firstly, the interior of a pipeline is coated with fusion-bonded epoxy graphene powder, the coated pipeline adopts an energy-saving fixed knot of a directly-buried pipe, a straight pipe section adopts a special prefabricated directly-buried heat preservation energy-saving pipe, a sliding support in a steel sheathed steel directly-buried pipe is further arranged, after the inner wall of the pipeline is coated with the fuse-bonded epoxy graphene powder, and theenergy-saving fixed knot of the directly-buried pipe, the prefabricated directly-buried heat preservation energy-saving pipe and the sliding support in the steel sheathed steel directly-buried pipe are organically integrated to form a pipeline assembly for long-distance conveying of the heat supply network. The method has the advantages that by means of the adoption, the resistance of the friction force of the inner wall of the pipeline to conveying of mediums can be greatly reduced, in addition, the heat loss in the medium conveying process can be greatly reduced, and therefore the pipelinecan meet the requirements of high-efficiency and energy-saving long-distance conveying.