In the paper the solubilities of anthracene , phenanthrene and carbazole are studied in benzene , toluene , xylene , the heavy solvent oil , clohexane , dmf , pyridine , cyclohexanone and acetone , and qualitative analysis is done by three aspects in the process of the solute dissolved the solvent : ( l ) the molecular struture and the interspace struture ; ( 2 ) reciprocity force of the intermolecule ; ( 3 ) the cohesion energy