The utility model discloses a high-voltage switch device, and an arc extinguish chamber and a tank body thereof. A solid insulation layer arranged in a partition manner between a gas outlet part and a tank body main body at a blowout side is assembled in the tank body, and the side face, facing the blowout side, of the solid insulation layer is a baffling face. During usage, the insulating gas ejected from a nozzle of a dynamic power connection end performs arc extinction on a high-voltage arc in a fracture and then is sprayed out from the blowout side on the dynamic power connection end and/or a static power connection end, the insulating gas is now not only still high in flow rate and temperature, but is also mixed up with some metal dust and ionization decomposers, the mixed gas with high temperature and high speed crashes on the baffling face of the fixed solid insulation layer, the baffling face plays a restraining role for the strong mixed gas, the energy of the mixed gas is released by a collision function, and thus Impact erosion of the mixed gas sprayed from the blowout side on the inner wall face of the tank body main body is avoided.