Wallboard heat exchanger and energy-saving type assembled breathing type movable board house wall

The invention relates to a wallboard heat exchanger and an energy-saving type assembled breathing type movable board house wall. The board house wall comprises a wallboard frame, a first partition plate, a second partition plate, a third partition plate, a heat exchange cylinder, a first sealing plate and a second sealing plate. An old air inlet cavity can be defined by the first sealing plate, the heat exchange cylinder, the wallboard frame, the first partition plate and the third partition plate; a first shutter and an old air inlet in the heat exchange cylinder communicate with the old airinlet cavity; a fresh air inlet cavity and an old air outlet cavity relatively positioned above the fresh air inlet cavity can be defined by the second sealing plate, the heat exchange cylinder, the wallboard frame, the second partition plate and the third partition plate; a second shutter and an air inlet in the heat exchange cylinder communicate with the fresh air inlet cavity; an old air outletcommunicates with the old