Gas supply device of gas analyzer

The embodiment of the utility model discloses a gas supply device of a gas analyzer, which is used for supplying a gas to the gas analyzer. The gas supply device comprises a controller, a main gas supply pipeline and a plurality of gas bottle matching systems, wherein the main gas supply pipeline is communicated with the gas analyzer; the plurality of gas bottle matching systems are sequentially distributed along the main gas supply pipeline; each gas bottle matching system comprises a gas bottle, a branch gas conveying pipeline, an electronic valve, a depressurizing valve and a pressure sensor. According to the embodiment of the utility model, the use sequence of gas cylinders can be set in advance, when a used gas cylinder meets the switching condition, the gas cylinder is switched by the controller, and an alarm signal of low pressure of the gas cylinder can be transmitted out, the switching operation is more accurate and reliable when compared with manual switching, the problem that the gas cylinder resource is wasted or the gas is not sufficient because of manual switching operation can be solved, and a great deal of labor and time cost can be reduced.