A　novel　polyoxovanadium　borate　H-3　{[Cu(en)(2)](5)　[(VO)(12)O6B18O42]　[B(OH)(3)](2)　.　16H(2)O　has　been　synthesized　from　a　rruixture　of　H3BO3,　NH4VO3,　Cu　(CH3COO)(2)　.　H2O　and　ethylenediamine　under　hydrothermal　condition　and　characterized　by　crystal　X-ray　structure　analysis,　IR　spectrum,　Raman　spectrum,　UV-Vis　DRIS　spectrum,　fluorescence　spectrum,　ESR　and　TGA.　In　the　structure　of　the　compound,,　there　is　a　ring　of　1318042　sandwiched　between　two　vanadium-oxygen　clusters　V6O18　by　eighteen　B-(mu(3)-O)-V　bonds,　and　the　anion　clusters　[　(VO)(12)　O6B18　O-42](13-)　are　connected　through　four　[Cu(en)(2)](2+)　by　the　static　electronic　interaction.　Thus,　the　complex　was　extended　to　an　infinite　two-dimensional　network　structure,　with　size　of　the　hole　amounting　to　0.619　-　817　nm.