Gas chromatography sampling method for gas extraction

The invention relates to a gas chromatography sampling method for gas extraction, and solves the problem that an additional solvent is needed for generation of sample gas. A carrier gas 1 respectively passes through a first pressure regulating valve 2 and a second pressure regulating valve 3 to respectively obtain two paths of carrier gases with different pressure outputs, after the carrier gas output by the second pressure regulating valve 3 passes through a first switching valve 4, one path of the carrier gas reaches a port 10-3 of a second switching valve 10, the other path of the carrier gas is connected with one end of a switching valve 26 through a two-way connector 27, and the other end of a sixth switching valve is connected with the upper end of a three-way pin. The side end of the three-way contact pin is connected with a port (22-2) of the third change-over valve, the lower end of the three-way contact pin is connected with the outlet end of a gas-phase or liquid-phase or solid-phase sample sealing