A conjugated polymer was prepared by an oxidation-coupling polymerization of triphenylamine (TPA) and trans-stilbene. The structure of the copolymer was characterized by elemental analysis,H-1 NMR, UV-vis and FT-IR spectra. The copolymer has good solubility in common organic solvents and high glass transition temperature. Fluorescence spectra showed that the copolymer is violet-blue light emitting material.