Title polymeric complex(EPU Eu(Ⅲ)) was obtained from triisobutoxy euro pium Eu(C 3H 7O) 3 with electropolyurushiol in isobutyl alcohol. The structure and property of the complex were characterized by FT IR, XPS, DMTA, AES, TG DTA and fluorescence spectrophotometry. The complex with Eu(Ⅲ) content reached up to 9 6% was insoluble in most organic solvents. Its electric resistance was 1 25×10 5 MΩ(that of EPU was 7 90×10 4 MΩ). Its T g and thermal resistance was considerably greater than that of EPU.