Abstract: In this work,the isotherms of phenol on polar,weakly polar and non-polar polym eric adsorption resins were determined.Fluid/solid adsorption phase equilibrium experiments under supercritical condition were conducted to determine the isothe rm of phenol on polar NKA-Ⅱ resin for system of "phenol/NKA-Ⅱ resin/S CF CO ₂" .The effect of addition of ethanol as the third component to the sys tem on the isotherms of phenol on the NKA-Ⅱ resin under supercritical condition was studied.Results showed that under normal conditions the equilibrium amount adsorbed of phenol on the NKA-Ⅱ resin was much more than those of phenol on the other two polymeric resins,and the equilibrium amount adsorbed of phenol on th e NKA-Ⅱ resin under the SCF condition was much less than that under the genera l conditions.The addition of ethanol to the supercritical systems could cause t he adsorption phase equilibrium of the supercritical systems to vary,which make s the equilibrium amount adsorbed of phenol on the resin decrease further.