Abstract: AQ/T 1019-2006 Methods of Gas Chromatography Analysis and Index Optimization for Mark Gases of Spontaneous Combustion of Coal Stratum and AQ/T 1084-2011 Testing Method and Judgment Standard of Explosion Hazard for Mixed Gases in Coal Mine Disaster Circumstance rules 10 and 11 kinds of components in mine gas chromatograph analysis, and at present, most of gas chromatograph analysis group is divided into 8 kinds. The problems existing in the gas circuit system of chromatograph were analyzed, and through the optimization of the gas circuit system of the research object, the optimization is designed. The optimized gas chromatograph is not only increases the number of components analysis,but also improves the chromatograph analysis precision, speed, and solves analytical error problems caused by the turbulence due to valve switch in the process of analysis.