Insulating oil chromatographic analysis automatic sampling device and sampling method

The invention discloses an automatic sampling device and method for chromatographic analysis of insulating oil. The automatic sampling device comprises a six-way valve, a quantitative tube, a valve terminal, a plurality of sample injectors, a carrier gas pipeline and a standard gas pipeline, a mass flow controller is arranged on the carrier gas pipeline, the carrier gas pipeline is connected with a branch pipeline with a first electromagnetic valve and a second electromagnetic valve through a three-way pipe, a gas inlet 2 communicated with the standard gas pipeline is formed in the position, close to the left side, of the valve terminal, and a third electromagnetic valve is arranged on the standard gas pipeline. A plurality of sample pipelines respectively connected with a plurality of sample injectors are uniformly distributed on the valve terminal; one end of the quantitative pipe is connected with a six-way valve interface 6, the other end of the quantitative pipe is connected with a six-way valve interfac