The samples of YVO4·xTa2O5:Eu3+(x=0.45,0.35,0.25,0.15,0.05)were synthesized by the conventional solid state reaction.The structure of the prepared sample was checked by the X-ray diffraction.XRD measurements at room temperature were confirmed that the prepared YVO4·xTa2O5:Eu3+ consisted of two phases。One phase was YVO4,which is tetragonal according with the JCPDS-Card(17-0341);the other phase was YTaO4,which is according with the JCPDS-Card(72-2018).The spectrum property of the sample was studied under the VUV.The effects of Ta doped on the luminescent properties of sample were investigated and it was found that some Ta doped could highlight the absorption of matrix in VUV region.The emission spectrum was dominated by the red peaks at 613 and 619 nm due to the electric dipole transition 5D0→7F2 of Eu3+.It indicated that Eu3+ occupied a site lacking inversion symmetry.There was one band peaked at 155 nm in the excitation spectrum of the sample,it could be assigned to the absorption of the host. The samples of YVO4 · xTa2O5: Eu3 + (x = 0.45,0.35,0.25,0.15,0.05) were synthesized by the conventional solid state reaction. The structure of the prepared sample was checked by the X-ray diffraction. XRD measurements at room temperature were confirmed that the prepared YVO4 · xTa2O5: Eu3 + consisted of two phases. One phase was YVO4, which is tetragonal according to the JCPDS-Card (17-0341); the other phase was YTaO4, which according to the JCPDS-Card (72-2018). The spectrum property of the sample was studied under the VUV. The effects of Ta doped on the luminescent properties of sample were investigated and it was found that some of the Ta doped could highlight the absorption of matrix in the VUV region. The emission spectrum was dominated by the red peaks at 613 and 619 nm due to the electric dipole transition 5D0 → 7F2 of Eu3 + .It indicated that Eu3 + occupied a site lacking inversion symmetry. Here was one band peaked at 155 nm in the excitation spectrum of the sample, it could be assigned to the absorption of the host.