Vacuum arc-extinguishing chamber and vacuum switch

The invention discloses a vacuum arc-extinguishing chamber and a vacuum switch. The vacuum arc-extinguishing chamber comprises an insulating shell, a static contact, a moving contact and a main shielding cover, wherein the static contact and the moving contact are arranged in the insulating shell; the main shielding cover is fixed in the insulating shell; the main shielding cover comprises a coil closed loop, the coil closed loop comprises a spiral coil, and the spiral coil surrounds the moving contact end of the moving contact and the static contact end of the static contact; the static contact and the moving contact are sequentially distributed along the axial direction of the spiral coil; under the condition that short-circuit current flows through the vacuum arc-extinguishing chamber, the spiral coil generates induction current, the induction current flows through the spiral coil to generate an induction magnetic field, and the induction magnetic field is a longitudinal magnetic field. Therefore, the main