Prefabricated box-type substation

The invention relates to the field of transformer substations, and discloses a preassembled box-type transformer substation, which comprises a box door, the box door is rotatably connected to the front side of the outer wall of a box body through hinges, the top surface of the box body is provided with heat dissipation holes, the inner bottom surface of the box body is provided with air inlet holes, and the inner bottom surface of the box body is fixedly provided with a U-shaped frame. A transformer chamber is fixed to the inner bottom face of the U-shaped frame, a fan is fixed to the inner wall of an air inlet hole, a connecting groove is formed in the bottom face of the U-shaped frame and corresponds to the air inlet hole, a plurality of air outlet holes are formed in the left side and the right side of the inner wall of the U-shaped frame correspondingly, and the air outlet holes communicate with the connecting groove. And a plurality of guide plates are respectively fixed on the left side and the right si