Effects　of　both　rare　earth　elements　and　polarization　electric　field　were　combined　to　obtain　a　series　of　new　photocatalysts,　Bi2ZnOB2O6:　xY(3+).　Tests　results　showed　that　the　Y3+　had　doped　into　the　BZBO　lattice　and　reduced　the　band　gap.　The　optimum　photodegradation　activity　of　Bi2ZnOB2O6:　xY(3+)　was　1.57　times　as　higher　as　the　pure　Bi2ZnOB2O6　in　Rhodamine　B　photodegradation.　The　enhanced　photocatalytic　activity　of　Bi2ZnOB2O6:　xY(3+)　was　mainly　ascribed　to　the　dopants　and　polarization　electric　field　in　promoting　the　photoabsorption　ability　and　separation　of　photogenerated　electrons　and　holes.