The present application discloses a power distribution unit (PDU), including three monophase sockets, a star-connected switching circuit, a delta-connected switching circuit and a controller. The controller is configured to correspondingly control the star-connected switching circuit or the delta-connected switching circuit to be turned on according to a current three-phase power wiring requirement of the power distribution unit, so that three phase windings on a secondary side of a distribution transformer are connected according to a target wiring mode conforming to the three-phase power wiring requirement, and three phase power under the target wiring mode is supplied to the three monophase sockets respectively. The PDU of the present disclosure simultaneously supports a delta wiring mode and a star wiring mode, and automatically selects a corresponding wiring mode according to the current three-phase power wiring requirement of the PDU.