A solar central laundry dryer is characterized by comprising a laundry drying box, an air compressor, an air tank, a control valve, a heat exchanger and a solar heat collecting panel which are sequentially connected; the upper part of the laundry drying box is provided with an air inlet plate in which a plurality of air inlets are provided, and the lower part of the laundry drying box is provided with an air outlet plate in which a plurality of air outlets are provided; air is compressed and conveyed to the air tank by the air compressor, then the compressed air is conveyed to the heat exchanger through the control valve for heating, then the compressed air enters to a laundry drying space between the air inlet plate and the air outlet plate from the air inlet plate for drying laundry; air coming from the air outlet plate returns back to an inlet of the air compressor for being compressed; the solar heat collecting panel is arranged on the heat exchanger, and is used for providing heating heat for the heat exchanger.