Gas direct injection mass spectrometry device

The utility model provides a gas direct injection mass spectrometry device. The gas direct injection mass spectrometry device comprises an in-situ source, a split-flow temperature control module and a mass spectrum, the shunting temperature control module comprises a four-way joint; the four-way joint comprises a first inlet, a second inlet, a first outlet and a second outlet; an outlet of the in-situ source is communicated with the first inlet through a first pipeline, the second inlet is communicated with a gas sample source through a second pipeline, the first outlet is communicated with a sample inlet of the mass spectrum through a third pipeline, and the second outlet is communicated with the atmosphere through a fourth pipeline. According to the technical scheme provided by the invention, direct sample injection in-situ analysis can be realized, organic solvent extraction or solid-phase extraction of chemical components in the flue gas is not needed, and the operation is simple and convenient. The in-si