Abstract: Distilling analysis method is often used in C₁~C₇light hydrocarbon of crude oil. It easily results in hydrocarbon loss and analysis accuracy reduction. A method of“increasing temperature evaporation”was used to analyze C₁~C₇light hydrocarbon, which did not need liquid nitrogen,reduced the cost of analysis and inhanced the reliability of analyzing each monomer hydrocarbon. This paper has given a minute description in the development of light hydrocarbon separator,experimental procedure,qualitative and quantitative analysis condition of evaporative hydrocarbon gas chromatography.

Key words: light hydrocarbon, evaporate, separator, gas chromatography