The invention discloses a dehumidification spare part cabinet device based on separation type cold and heat exchange. The dehumidification spare part cabinet device comprises a cabinet body and a cabinet door connected with the cabinet body through a hinge in a rotatable manner, wherein multiple layers of storage drawers capable of being pulled freely are arranged in the cabinet body; two side walls of each storage drawer are connected to the inner side wall of the cabinet body through guide rails in a sliding manner; and a dehumidifier is fixedly arranged at the bottom end in the cabinet body. The dehumidifier is actively introduced into the storage cabinet with high sealing property, and by the cooperation with drawer type storage drawer structures connected through the sliding rails in the sliding manner, storage of precision spare parts is facilitated; meanwhile, by the improvement on the internal structure of the dehumidifier, a condenser and a heat dissipater are separately arranged; furthermore, by control over environmental humidity, the reliability and the service lives of electrical appliances and machinery inn a protected space can be improved, and the protection design level of equipment can be reduced; cold air from the refrigeration end in the dehumidifier is introduced into the heating end through a U-shaped roundabout air duct, so that the heat dissipater at the heating end is cooled by the cooling air, and the heat dissipation efficiency and the dehumidification efficiency are improved; and moreover, low humidity drying can be continuously kept in the cabinet body, and the corrosion resistance durability is more excellent.