Magnetic blow-air blow combined arc extinguishing device and method for high-speed grounding switch

The invention discloses a high-speed grounding switch magnetic blow-air blow combined arc extinguishing device and method, and the device comprises a high-speed grounding switch moving contact, a high-speed grounding switch static contact, a fixed part, a piston, a spring, an insulating part, a moving end coil, an arc striking ring, a cooling ring and a static end coil, wherein the fixed part, the piston, the spring, the insulating part and the moving end coil are installed at the moving contact side; wherein the moving contact and the static contact of the high-speed grounding switch are closed and opened in a plug-in structure. Coils are mounted on a moving contact and a static contact of the high-speed grounding switch to generate a magnetic field acting on a breaking arc of the moving contact and the static contact, so that the arc rotates under the action of electromagnetic force; a piston is arranged in the moving contact, and the moving contact presses the piston to spray out gas when acting and ground