Box-type substation, also called pre-assembled substation or pre-assembled substation. It is a kind of high-voltage switchgear, distribution transformer and low-voltage distribution device, according to a certain wiring scheme arranged into a factory prefabricated indoor, outdoor compact power distribution equipment, that is, transformer step-down, low-voltage power distribution and other functions organically combined together, installed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, anti-theft, heat-insulating, fully enclosed, movable steel box, especially suitable for the construction and transformation of the city network is a new type of substation after the rise of It is a brand-new substation which rises after the civil substation. Box-type substation is suitable for mines, factories, oil and gas fields and wind power stations, which replaces the original civil power distribution room, distribution station, and becomes a new type of complete sets of substation and distribution equipment.