Abstract: In this article, the principles, characteristics and study status at home and abroad of supercritical CO2 fluid (SCF) extraction technology were introduced.The research progress in SCF in functional oil extraction and the influence factors containing pressure, time, temperature, CO2 flux etc.were reviewed.The SCF process parameters of different functional oils were compared, and the indicators and quality of oils extracted by SCF were analyzed.In addition, we performed application prospects of the SCF technology.