Cooling and dedusting method and device for switch cabinet of hydraulic power plant

The invention relates to the technical field of switch cabinets, in particular to a hydraulic power plant switch cabinet cooling and dedusting method and device, and the method comprises the steps: installing a ventilation device on the cabinet wall of a switch cabinet; external air is injected into the switch through a ventilation pipeline in the ventilation device; air entering the switch cabinet is filtered through the filtering part in the ventilation device, and dust and impurities are prevented from entering the switch cabinet; and high-pressure air in the switch cabinet is exhausted through an exhaust port in the ventilation device, so that the temperature in the switch cabinet is taken away. According to the cooling and dedusting method and device for the switch cabinet of the hydraulic power plant, air entering the switch cabinet is filtered through the filtering part in the ventilation device, the filtered air enters the switch cabinet to increase the pressure of the switch cabinet and then is exhau