The utility model discloses an energy -saving switch cabinet, including the cabinet body, weather shield, cabinet door and solar cell panel, the lower part is equipped with a set of cabinet door in the front side of the cabinet body, and the cabinet door is equipped with transparent viewing window for to opening the door on the cabinet door, the weather shield is established on the left and right sides wall of the cabinet body, and weather shield top -down interval is equipped with a plurality of groups, and the inside of weather shield is equipped with a cavity, and the top of weather shield is equipped with an oblique decurrent slope, and is equipped with a plurality of bar ventilation groove on the body of the cabinet in the cavity, is equipped with a plurality of second ventilation groove on the lateral wall of weather shield, and second ventilation groove is also for the ventilation groove of bar, and second ventilation groove and the crisscross setting in bar ventilation groove. The utility model has the advantages of simple structure, when needs are lowered the temperature to the cubical switchboard, only need open the ventilating fan, the internal air of cabinet is taken out to the ventilating fan, then the air of the external side of cabinet to enter into the cabinet through bar ventilation groove internal for the air of the internal portion of cabinet flows, thereby lowers the temperature to the cubical switchboard.