Abstract: With 4,4'-naphthidine as a parent compound and N,N'-di（α-naphthyl）-N,N'-diphenyl-4,4'-benzidine（α-NPD） as a model,N,N'-d_i（α-naphthyl）-N,N'-diphenyl-4,4'-naphthidine（α-NPN） was synthesized and characterized by ~1HNMR and EA.Determined by DSC,α-NPN has a higher glass transition temperature（T_g=128℃） than that of α-NPD.The absorption and thin film photoluminescence spectra of α-NPN red-shifts relative to those of α-NPD.Its oxidation potential,determined by cyclic voltammetry in solution,is 1.20V,higher than 1.02V of α-NPD.Additionally,α-NPN thin film emits bright blue fluorescence（461 nm） with a quantum efficiency of 8.5%,higher than that of α-NPD（5.5%）.The structure-property analyses prove that α-NPN potentially serve as a good hole-transport material.