The utility model relates to an insulating bus structure, including a set of isolated bus, the isolated bus includes the conductor, pours the insulating layer outside the conductor, is provided with the buffering area between insulating layer and the conductor, and the insulating layer is epoxy impregnated paper structure, and two tip of conductor do not are provided with binding post, set up insulating connecting sleeve between the two adjacent isolated buses, and the intracavity of insulating connecting sleeve is provided with the flexible coupling copper strips that is used for connecting two adjacent isolated bus binding post, the section of thick bamboo wall of insulating connecting sleeve is epoxy impregnated paper structure. The utility model discloses it is reasonable inadequately effectively to solve current bus structure, and insulating properties is good problem inadequately.