Prefabricated substation convenient to maintain

The invention discloses a prefabricated substation convenient to maintain. The prefabricated substation comprises a distribution box body, the power distribution box body comprises a power transformation box base, an air inlet chamber and a power distribution room unit, and a cylindrical heat dissipation chamber is formed in the center of the power transformation box base along the height direction of the power transformation box base. An auxiliary heat dissipation mechanism is arranged in the cylindrical heat dissipation chamber, a plurality of power distribution room units are annularly arranged at the edge of the bottom end of the power transformation box base at equal intervals, and each power distribution room unit comprises a rectangular power distribution chamber, a linkage supportused for fixing a power distribution instrument and a driving mechanism. An air inlet chamber with a fan-shaped cross section is arranged between every two adjacent rectangular power distribution chambers, and through holes c