The solubilities of three kind of solids polychlorinated biphenyls (PCBs),4,4'-dichlorobiphenyl, 2,3',4',5 '-tetrachlorobiphenyl, and 2,2',3,3',4,4'-hexachlorobiphenyl in supercritical CO2, have been measured at temperature from 308.1 to 328.1 K, and pressure from 9 to 45 MPa. The data were obtained in a static apparatus with a high pressure equilibrium view Cell. Also, the characteristic of supercritical fluid extraction for the cleaning up of soils which are contaminated with PCBs, have been studied. An o...