In this study, Aromatic Heavy Oil has been extracted with near-critical n-hexane, and the dependence of temperature and pressure to extraction behavior and selectivity has been investigated. Boiling point distribution of extracts, extracted at vapor-liquid behavior conditions, was significantly different from that of Aromatic Heavy Oil. As increasing of extraction temperature, extraction quantity at unit solvent quantity was increased without the compensation for extraction selectivity of boiling point distribution. The increasing of extraction pressure, however, decreased the extraction selectivity of boiling point distribution though extraction quantity at unit solvent quantity was increased. The change of extraction conditions could not affect the selectivity of chemical compositions.