LaPO4：Dy phosphors with different morphology were prepared by adjusting phosphorus sources and reagent in hydrothermal reaction and their vacuum ultraviolet excited luminescence were investigated. The results show that the luminescent intensity of LaPO4：Dy phosphor varies for different morphologies and different particle size. The site symmetry of Dy3+ ions in the LaPO4：Dy phosphor with three different morphologies was consistent and the ratio of yellow emission to blue emission of the three phosphors was kept in 1 to 1.5. From the comparison of the excitation spectra of LaPO4：Dy and GdPO4：Eu it could been seen that the energy transfer efficiency from phosphate host to Dy3+ ion is lower than that to Eu3+ ion. Meanwhile stronger f-d transition was observed in the excitation spectra.