The samarium electropolyurushiol coordination polymer was obtained from samarium chloride and electropolyurushiol in isopropyl alcohol solution．The coordination polymer was characterized by FT-IR

Fluorescence spectrum

XPS

DMTA

DTA-TG and AES

and its composition and structure were determined．Each Sm3+ ion is coordinated by hydroxyls from three units in EPU molecule．It showed that there is a certain coordination between Sm3+ and EPU in the coordination polymer

thus crosslinking was formed．Therefore the polymer with Sm3+ content as high as 13.18％ is insoluble in the organic solvents．Its electric resistance is 9.6×1010 Ω (that of EPU was 7.9×1010 Ω)．Its glass transition temperature and heat resistance are considerably greater than those of EPU．