The invention discloses a power distribution apparatus with main transformer low-framework traverse. The existing power distribution apparatus is large in longitudinal dimensions and large in occupied area; and in addition, by adopting a conventional framework, the framework is relatively high in height. The invention adopts a technical scheme as follows: three phases of an II section bus are upwardly led to an upper overline; then an A phase and a B phase are led out from the upper overline through flexible wires to a suspension pipe bus, and a C phase is led to a supporting column insulator; three phases of an I section bus are downwardly led to HGIS equipment; after passing through the HGIS equipment, an A phase and a B phase are led to the suspension pipe bus, and a C phase is led to the supporting column insulator; the A phases and B phases of the II section bus and the I section bus pass through suspension pipe traverse and then are led downwardly to a lightning arrester, and then are led upwardly from the lightning arrester to a main transformer overline; and the C phases of the II section bus and the I section bus are both led to the lightning arrester, and then are led upwardly from the lightning arrester to the main transformer overline. By virtue of framework optimization, the power distribution apparatus is small in longitudinal dimensions and low in height.