Abstract: The oil and gas geochemical analysis technology has gone through three processes of establishment,growing and innovation in our country since it being introduced from former Soviet Union in 1950's.The important new techniques developed in recent years are detection of light hydrocarbons in oil,gas and rock,organic geochemical methods determining the migration and covering conditions of natural gas,organo-petrologic analysis methods,reservoir geochemical analysis techniques,thermal simulating experiment technique of quadratic hydrocarbon-generation and so on.The development trends of oil and gas geochemical analysis technology mainly include paying great attention to high-speed quantitative analysis and multi-instrument on-line detection techniques,developing the geochemical analysis methods of oil-gas-water migration and accumulation,establishing the experimental analysis methods and standards on carbonate rock evaluation in the south of our country and further perfecting the analysis techniques on natural gas migration-accumulation-preservation conditions and natural gas resource evaluation.