The invention discloses a natural gas pipeline with a warning pneumatic valve. The natural gas pipeline comprises a natural gas pipeline body. Standard connectors are installed at the two ends of the natural gas pipeline body. The natural gas pipeline body comprises a natural gas hose, a corrugated steel pipe and a plastic housing casing pipe, wherein the corrugated steel pipe is fixedly arranged outside the natural gas hose in a sleeving mode; the plastic housing casing pipe is arranged outside the corrugated steel pipe and provided with the pneumatic valve; the bottom of the pneumatic valve is connected into the plastic housing casing pipe through a gas guide pipe. In this way, the safety of the natural gas pipeline can be detected, a prompt is given in time when the natural gas pipeline leaks gas, and as the natural gas pipeline has multiple protective measures, the safety can be improved greatly and the service life can be prolonged.