Abstract: An air gun firing system, working in conjunction with an air gun with a barrel and comprising: a bullet chamber on the front end of the main body, connected with the barrel for housing a bullet to be fired through the barrel; a lock, glidingly movable along the axis of the barrel, pushing the bullet into the bullet chamber, as driven by a lock driver, enabling the bullet to be fired, with a spring pulling back the lock; a gas chamber for driving the lock driver, accommodating the lock driver; a high-pressure gas container; a first pressure reducing valve; a second pressure reducing valve; and an electromagnetic valve, controlling flow of low-pressure gas into the gas chamber. When the electromagnetic valve opens, low-pressure gas flows into the gas chamber, driving the lock driver. When the electromagnetic valve closes, the spring pulls back the lock and the lock driver.