Abstract: We propose a kind of technical solution for fast sampling and analysis of environmental parameters for underground disaster area, and advanced 3000 micro GC micro gas chromatograph is used as a basis, with the design ideas of decomposition of current and power, independent power supply of each part, to develop portable intrinsic safe explosion-proof gas chromatograph. Rescue team can carry it to underground disaster site to test ten kinds of coal mine gas involving O₂, CH₄, CO, H₂, N₂, CO₂, C₂H₂, C₂H₄, C₂H₆, C₃H₈ using two channels with one time sampling in 120 s accurately, the detection precision can be 1×10^-6 level.