Power distribution unit and shelf system

The utility model relates to a power distribution unit and a shelf system. The device comprises a wiring terminal which is provided with an input end of power supply power and a leading-out end of the power supply power; the at least one patch board is electrically connected with the leading-out ends respectively; a plurality of power output terminal groups, each power output terminal group comprising at least one power output terminal, each of the power output terminals being electrically connected to the patch panel, respectively; and a plurality of switching mechanisms provided so as to correspond to the power output terminal groups, the switching mechanisms electrically connecting or disconnecting the corresponding power output terminal groups and the patch panel. According to the invention, through the structural relationship between the plurality of power output terminal groups and the plurality of switching mechanisms, the power output of each path is independently controlled and protected, and further