The utility model belongs to the technical field of the technique of electric mounting cabinet and specifically relates to a waterproofly prevent grey electrical control cabinet, the power distribution box comprises a box body, the interior baffle no. 1 that is equipped with on 10 centimetres of positions of upper surface of box of box, be equipped with baffle no. 2 on the position that the interior lower surface from the box of box is 10 centimetres, baffle no. 1 and baffle are equipped with baffle no. 3 in the box between two, the width of baffle no. 1 and baffle no. 2 is the same with the width of box, the width of baffle no. 3 is the half the of baffle no. 1 or baffle no. 2, be equipped with a plurality of louvre on baffle no. 1 and the baffle no. 2, be equipped with a plurality of air intake on the upper surface of box and the preceding shrouding of baffle between one, be equipped with a plurality of air outlet on lower surface on the box and the back shrouding of baffle between two. The utility model discloses an electrical control cabinet can reach ventilation cooling's effect, also can make the electric fittings on the baffle no. 3 prevent greyly and waterproof and simple structure, convenient to use.