Wall body maintenance device and building facility with wall body maintenance device

The invention discloses a wall body maintenance device, which comprises a cold bridge breaking keel used for wall body connection, wherein a web plate of the cold bridge breaking keel is vertical to a wall body; the outer side of the cold bridge breaking keel is fixedly provided with a plurality of square wooden beams along the longitudinal direction; the square wooden beams extend along the horizontal direction; a plastic extruding heat insulation plate is clamped, connected and installed between the longitudinal adjacent square wooden beams; a desulfurized gypsum spraying building mortar layer is arranged at one side, facing the wall body, of the plastic extruding heat insulation plate; a calcium silicate plate is arranged at the outer side of the square wooden beams and the plastic extruding heat insulation plate. The use of the cold bridge breaking keel realizes the structure building of the novel wall body maintenance device; the retardarce of the heat conduction between the wall body and the wall body m