A series of polyarylates PAR-Pn(n is 0.05%, 0.10%, 0.15% and 0.20% respectively, indicating the content of 3,9-perylene diacyl chloride, calculated based on the mount of bisphenol A, the same below) with varied ratios of perylene unit were synthesized by means of interfacial condensation of perylene-3,9-dichloride, bisphenol A, isophthalic chloride and terephthaloyl chloride. The thermal stability and optical properties of the polyarylates were characterized by DSC, TGA, DMA, UV-vis and PL. The initial thermal decomposition temperatures and the glass transition temperatures of the polyarylates are above 468 ℃ and 211 ℃, respectively, which implies the polyarylates have high thermal stability. Furthermore, all the polyarylates have photoluminescent characteristics with photoluminescent peaks at 480~540 nm. The fluorescence intensity increases with the increase of perylene ratio. In addition, the polyarylates have good solubility in common organic reagents, which provides the possibility of wet preparation of polymer films.