The orientational order of a liquid crystalline(LC)system is in favor of the alignment of nonlinear optical(NLO)units．If a NLO unit is also a LC unit

the resulted liquid crystalline NLO polymer may possess a higher orientational order and therefore promote the nonlinear optical sensibility A polymalonate side chain liquid crystalline(LC) polymer with a nonlinear optical nitro azobenzene type mesogenic unit has been synthesized by melt polycondensation

which was characterized by FTIR and 1H-NMR．The thermal transition temperatures and LC properties of the polymer were determined by DSC

polarized optical microscope(POM) and WAXD．A typical smectic focal conic texture was observed under POM and two small sharp WAXD peaks corresponrling to Bragg’s spacings 2.74nm and 1.35nm appeared in the smecticphase．Moreover

spin-coating films of the polymer through corona poling possessed an orientational order parameter ∮=0.33 calculated from UV measurements．But light scattering resulted from the crystallization of the polymer reduced the transparency of the polymer film and some small sharp peaks appeared in the UV spectra.