Spherical Sr2Al2SiO7∶Eu2+ phosphor was prepared by spraying of AlOOH/Sr(NO3)2/SiO2/Eu composite sol technique. Three-dimensional oriented dry xerosol particle was obtained due to the self-assembly of nanoscaled pseudoboehmite sol particles and SiO2 nanoparticles. Hierarchical Sr2Al2SiO7∶Eu2+ phosphor particles were obtained by sintering dry xerosol particles at 1300 ℃. XRD results show that the Eu2+ ions partially substitute for Sr2+ sites on Sr2Al2SiO7 lattice. The excitation band of 326 nm is attributed to the transition from 4f to 5d in Eu2+ ions of Sr2Al2SiO7∶Eu2+ phosphor. The emission of Eu2+ ions 4f65d→4f7 transition lies at ～500 nm.