Ventilation device of control box

The utility model relates to the technical field of control boxes, and discloses a ventilation device of a control box, which comprises the control box, heat dissipation holes are formed in the lower ends of the left end and the right end of the control box and correspond to each other, baffles are movably mounted at the upper ends of the two groups of heat dissipation holes through hinges, and bearings are fixedly mounted at the lower ends of the front side walls of the two groups of baffles. Middle shafts of the two bearings are fixedly connected with abutting rods, and clamping blocks are welded to the middles of the lower ends of the left side wall and the right side wall of the control box correspondingly. The baffles are movably mounted at the upper ends of the two groups of heat dissipation holes through hinges, the abutting rods are movably mounted at the lower ends of the baffles, and the abutting rods correspond to the clamping blocks welded to the middles of the lower ends of the left side wall and