Fe2O3/TiO2　nanocomposite　photocatalysts　were　synthesized　by　supercritical　fluid　combination　technique,　consisting　of　sol-gel　method　and　supercritical　fluid　drying.　The　photocatalytic　activity　of　the　samples　was　evaluated　by　the　degradation　of　acrylic　acid.　The　results　indicated　that　the　Fe2O3/TiO2　nanocomposite　catalysts　prepared　by　this　novel　technique　showed　significant　improvement　in　catalytic　activity　compared　with　pure　TiO2　or　Fe2O3/TiO2　catalysts　prepared　by　traditional　drying.　Both　infrared　and　ultraviolet　spectrum　of　Fe2O3/TiO2　nanocomposite　photocatalysts　shift　a　little　to　lower　wavelength　indicating　that　the　absorption　threshold　of　Fe　doped　nanocomposite　photocatalysts　shift　into　the　visible　light　region.　This　phenomenon　was　also　attested　by　the　photocatalytic　degradation　test　under　visible　light.