The utility model discloses a can surround over -and -under type power maintenance system that waits to repair thing, be in including lifting support and setting the last maintenance support of lifting support, the maintenance platform of maintenance has the bottom and has the work opening that the thing was waited to maintain in the encirclement, lift platform's tip has the fly leaf that can open, the fly leaf with the adjacent setting of work opening, the fly leaf open the back form with the maintenance running -on of work opening intercommunication.