Relaxor　ferroelectrics　of　0.65Pb(Mg1/3Nb2/3)O-3-0.35PbTiO(3)　(PMN-35PT)　were　prepared　using　the　columbite　precursor　proceeding.　The　influences　of　sintering　temperature　on　the　phase　transition,　dielectrical　response,　and　Raman　scattering　in　the　relaxor-ferroelectric-system　PMN-35PT　have　been　investigated　in　detail.　X-ray　diffraction　analysis　indicated　that　the　phase　structure　of　the　materials　changed　from　rhombohedral　to　tetragonal　when　the　sintering　temperature　increased　from　1000　to　1250　degrees　C.　The　stress　relaxation　induced　by　the　enlarged　grain　size　was　responsible　for　the　phase　transition　phenomena.　The　dielectric　studies　revealed　that　the　indicator　of　the　degree　of　diffuseness　gamma　decreased　with　the　increase　in　the　sintering　temperatures　from　1000　to　1150　degrees　C,　indicating　that　the　dielectric　relaxation　behavior　was　weakened;　while　at　higher　sintering　temperature　above　1200　degrees　C,　gamma　increased　subsequently　due　to　the　formation　of　Pb　vacancy.　The　Raman　analysis　provided　another　evidence　for　the　phase　transition　from　rhombohedral　to　the　tetragonal　according　to　the　intensity　changes　of　A(1g)　mode.　Meanwhile,　the　ratios　of　the　relative　intensity　Nb-O-Mg　to　that　of　Nb-O-Nb　band　revealed　the　degree　of　the　B-site　cation　order,　and　the　variation　trend　of　these　Raman　modes　correlate　well　with　the　dielectric　measurement　results.