Natural gas safety valve

The invention provides a natural gas safety valve. The natural gas safety valve comprises a valve body, a valve cover, a gas inlet adapter, a support, a baffle and a microswitch, wherein the gas inlet adapter is connected with the valve body; the valve body is connected with the valve cover; the support is connected with the valve cover by a bolt; the baffle, the microswitch and the support are fixed by bolts and nuts; the valve body and the valve cover form a cavity; a valve element assembly is arranged in the cavity; when the medium pressure in a fuel gas system pipeline exceeds a normal value, under the effect of the medium pressure, the valve element assembly is subjected to axial displacement towards the microswitch, the microswitch is triggered to cut off a circuit; a reset spring is mounted between the upper end face of the valve element assembly and the lower end face of the valve cover; when the medium pressure recovers to a normal value, under the effect of the reset spring, the valve element assemb