Power distribution cabinet capable of automatically keeping internal dryness according to external environment

The utility model relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet capable of automatically keeping internal dryness according to the external environment, which comprises a cabinet body, a support frame arranged at the bottom of the cabinet body, a mounting plate arranged between the two support rods, and an air collecting cover fixed at the bottom of the mounting plate. When the external environment temperature is low and reaches a set value of the temperature sensor, a power supply of the fan can be automatically switched on, suction force is generated when the fan works, external cold air is sucked into the fan through the air inlet pipe, and the external cold air flows into the air inlet pipe before entering the air inlet pipe. When the cold air is heated, the cold air needs to be sequentially treated by the filter screen, the electrostatic adsorption layer and the activated carbon filling layer in the air collecting cover, then the outside cold