The utility model discloses an electric power cabinet that radiating effect is good, including the casing, be equipped with the rainproof sunshade board on the casing top, both sides are equipped with logical groove in the casing, lead to the inslot and are equipped with the diaphragm, and the both sides of diaphragm are equipped with the spout, and the spout is connected with the riser through the slider, is equipped with a plurality of louvres between the spout of diaphragm both sides, and the casing top is equipped with the air exit, and the position that corresponds on the air exit is equipped with cooling fan, is equipped with the emergency exit on the casing, is equipped with the viewing aperture on the emergency exit, and the emergency exit lower part is equipped with the heat dissipation window. The utility model discloses simple structure, reasonable in design, through diaphragm in the casing can the groove is random installs and dismantle through leading to according to the object size, the riser passes through the spout, the slider can be effectual separately according to the actual conditions of object, being equipped with the trumpet - shaped air exit and the cooling fan at louvre, casing top through the diaphragm, can effectively discharging the steam that goes upward, the radiating effect is good.