The pull trigger protection switch is used for converting dip switch on the circuit, belonging to the core control device of circuit switching. The pull trigger protection switch is widely used in various types of aircraft cockpit, cabin or other necessary human control panel and other key control panel. We adopt the international mainstream lock form; each pulling direction is provided with the locking and unlocking effect. The pull trigger protection switch can be operated by pulling the switch, the locked position only can be unlocked by pulling along the axial direction.