Isolating switch device

An isolating switch device comprises a moving knife main shaft, a rotating crank arm and a fixed supporting piece. A plurality of moving knife contact assemblies are arranged on the moving knife main shaft; one end of the movable cutter main shaft is connected with the rotary connecting lever in a non-fixed mode, and the rotation of the rotary connecting lever can drive the movable cutter main shaft to rotate; the moving knife contact assembly can move between a closing position and a grounding position under the driving of the moving knife main shaft; at the closed position, the moving knife contact assembly electrically connects the wire inlet terminal of the isolating switch device with the static contact assembly of the isolating switch device; at the grounding position, the moving knife contact assembly connects an incoming line terminal of the isolating switch device with a grounding terminal of the isolating switch device; and the other end of the moving knife main shaft is adjustably connected to a wi