The embodiment of the utility model discloses a gas-insulated switch device comprising a metal drum sealed with insulating gas, a bus and switch equipment, wherein the metal drum sealed with insulating gas is used for sealing the bus and the switch equipment; the bus is used for connecting all current-carrying branch circuits together; the switch equipment comprises a circuit breaker and an isolating switch and is used for switching-on and switching-off current and isolating voltage; and the circuit breaker is connected with the bus by the isolating switch, and the bus and the circuit breakerare distributed in parallel. In the gas-insulated switch device provided by the embodiment of the utility model, the circuit breaker is distributed in a straight line manner, and is matched with the size of a power distribution unit, thus effectively reducing occupying area of the gas-insulated switch device and reducing construction cost of a substation correspondingly.