SF6 breaker pneumatic explosion chamber

The invention provides an SF6 breaker pneumatic explosion chamber. The SF6 breaker pneumatic explosion chamber comprises a static contact module and a moving contact module, wherein the static contact module comprises a static arc contact, the moving contact module comprises a pneumatic cylinder, a moving arc contact and a tubular nozzle, the moving arc contact and the tubular nozzle are respectively connected with a bottom of the pneumatic cylinder, a pneumatic chamber is formed between the bottom of the pneumatic cylinder and a piston, an inner hole of the tubular nozzle is communicated with the pneumatic chamber, the moving arc contact is in matching with the static arc contact, and the piston of the pneumatic cylinder is provided with multiple one-way check valve units realizing air incoming towards the pneumatic chamber. When a breaker carries out automatic reclosing operation, pressure of internal air of the pneumatic chamber is lower than external air pressure, the one-way check valve units are open, t