The utility model relates to the technical field of a transformer, especially to a distribution box body of a transformer. The distribution box body comprises a transparent box body made of a non-metal insulating material; a transformer chamber, a high-voltage distribution chamber, and a low-voltage distribution chamber are arranged in the box body; a first air duct with convection is arranged between the transformer chamber and the high-voltage distribution chamber; and a second air duct with convection is arranged between the transformer chamber and the low-voltage distribution chamber. And an air inlet fan and an air-out fan are arranged at the box body, wherein the first air duct, the second air duct, the air inlet fan and the air-out fan form a loop. According to the utility model, the box body that is made of the non-metal insulating material has a good corrosion-resistant performance, a good rustless property, a long service life, an insulation property, and a heat radiation structure and can be used securely; and a safety requirement can be met. Moreover the provided distribution box body has the advantages of simple structure, scientificity and reasonability, easy manufacturing, and low cost.