The utility model discloses a rain -proof damp -proofing outdoor distributing box, including box, hot -blast way, head race and rain -proof top, rain -proof top sets up the top of box, rain -proof top is equipped with a plurality ofly the head race the left side of box is equipped with hot -blast way be equipped with the device that generates heat in the hot -blast way, it is equipped with a fan a to generate heat the top of device the right side of box is equipped with the air -out pipeline be equipped with fan b on the air -out pipeline still be equipped with a humidity inductor in the box. The utility model discloses a hot -blast heating makes the moisture discharge in the box go, thereby reduction steam etc. Are to the influence of box inner part. Flow away the rainwater guide through the head race simultaneously, reduce it and enter into the condition in the box.