Moistureproof electric control cabinet

The invention discloses a moistureproof electric control cabinet, relating to the field of industrial automation. The moistureproof electric control cabinet comprises a cabinet body, wherein a ventilation system is arranged in the cabinet body; an automatic control system for controlling the ventilation system to work is arranged in the cabinet body; a bypass refrigeration pipeline which is communicated with a refrigeration system outside the cabinet body and is controlled by the automatic control system is arranged in the cabinet body; a temperature rise system which is controlled by the automatic control system and heats for preventing moisture when the refrigeration system does not work is arranged in the cabinet body; a humidity sensor for detecting the air humidity is arranged in the cabinet body; and the temperature rise system is started when a humidity signal, which is acquired by the automatic control system, of the humidity sensor, is greater than a set value, the refrigeration system runs, the refr