The invention discloses a gas chromatograph, a multi-channel carrier gas flow path, and a gas path control method; the multi-channel carrier gas flow path comprises a pressure-stabilizing valve, a multi-channel, a flow-stabilizing device and a ventilation pipeline, and the multi-channel is opened with a plurality of The air port, the pressure-stabilizing valve and the steady-flow device are respectively communicated with the plurality of air ports through the ventilation pipeline. Compared with the prior art, firstly, due to the use of multiple channels, the arrangement of the ventilation pipelines in the multi-channel carrier gas flow path is reduced, so that the structure is more compact and simple, and the occupied space is reduced, which is not only conducive to the centralized management of the multi-channel carrier gas control. , realize the modular management of flow path control, and also facilitate the miniaturization of the gas chromatograph; in addition, the integrated installation of the pressure-stabilizing valve and the flow-stabilizing device can realize the constant pressure and constant flow control of the carrier gas at the same time, and make the gas flow control more convenient. Accurate and convenient; in addition, the air flow is controlled by the pressure stabilizer valve and the stabilizer valve, which replaces the expensive electromagnetic proportional valve and sensor, and the failure points are also reduced, which greatly saves the manufacturing cost and maintenance cost.