To obtain a distribution system switching device in which a distribution system can be switched during short time power interruption and which is made small in size and inexpensive in cost by common use of a semiconductor switch.

In the distribution system switching device, a plurality of feeders 21L, 22L, 12L, 11L are respectively connected to DC bus-bars 1, 3 of substations on fixed position and opposite position sides via breakers VCB 1 through VCB8 and disconnectors DS1 through DS8, the feeders 21L, 22L, 12L, 11L on the fixed position side and the feeders 21L, 22L, 12L, 11L on the opposite position side are connected via feeder lines 5, 6, the DC bus-bars 1, 3 on the fixed position and opposite position sides are connected to the respective feeders 21L, 22L, 12L, 11L via the common semiconductor switches 7, 8, and the respective switching units LBS1 through LBS8, and power supplies of the feeder lines are successively switched by opening/closing of the breakers VCB1 through VCB8 and the disconnectors DS1 through DS8 and also by opening/closing of the semiconductor switches 7, 8 and the switching units LBS1 through LBS8.