采用溶胶凝胶法制备了纳米微晶Ｘ１Ｙ２ＳｉＯ５∶Ｅｕ，研究了室温和１５Ｋ下的光致发光特性．透射电子显微镜的测量结果表明，样品的平均粒径为５０ｎｍ．通过低温下的格位选择激发，分别得到Ｘ１Ｙ２ＳｉＯ５∶Ｅｕ中两种格位的Ｅｕ３＋离子各自的光致发光光谱，确定了谱峰位置．在格位选择激发下，两种格位的发光衰减均呈很好的单指数关系，５Ｄ０能级的寿命分别为３００和２１８ｍｓ． The nanocrystal X1Y2SiO5:Eu was prepared by sol-gel method and the photoluminescence properties were studied at room temperature and 15K. The results of transmission electron microscopy showed that the average particle size of the sample was 50 nm. The luminescence spectra of Eu3 + ions in two kinds of lattice sites of X1Y2SiO5:Eu were obtained respectively by lattice selection excitation at low temperature, and the position of the peak was confirmed. Under the grid excitation, the single-exponential decay of the luminescence of the two kinds of lattice sites shows a good exponential relationship, and the lifetimes of the 5D0 level are 300 and 218 ms, respectively.