The UV-Vis absorbance data of TNT/acetone,TNT/toluene and TNT/acetonitrile with different concentrations were measured. Acetonitrile was used as recrystallizing solvent,and the solubility of TNT in supercritical carbon dioxide(SC-CO₂) was tested at 303,308,313,318, 323 K and at pressure range of 10-25 MPa. The relationship of concentration and absorbance of TNT/acetonitrile solution at 248 nm wavelength was established. The results show that the solubility of TNT in SC-CO₂ decreases with increasing of the temperature at the pressure (less than 15 MPa). However,it will increases with increasing of the temperature at high pressure (more than15 MPa). TNT has a high solubility in SC-CO₂ and its value can get up to 14 mg TNT per gram of CO₂.