Prefabricated transformer substation capable of automatically dissipating heat

The invention discloses a prefabricated substation capable of automatically dissipating heat. The prefabricated substation comprises a substation foundation, a transformer chamber, a high-voltage chamber and a low-voltage chamber, wherein the transformer chamber, the high-voltage chamber and the low-voltage chamber are arranged above the substation foundation; wherein a plurality of heat exchange pipelines convenient for external air to flow through are respectively prefabricated in the transformer chamber, the high-voltage chamber and the low-voltage chamber. According to the principle of the chimney effect, heat exchange pipelines are installed at the four corners of the prefabricated substation, the lower portions of the pipelines communicate with a substation foundation, the upper portions of the pipelines communicate with an air interlayer of a top cover, a heat dissipation chimney is installed outside the top cover, and cold air in the foundation is pumped out of the top cover through response of the ch