本文描述了由氮分子激光器，小型光栅单色器，光电倍增管（ＰＭＴ），记忆示波器等组装成的激光荧光寿命测量装置。讨论了该装置的测量原理和方法，并测定了ＹＡＧ晶体，钒磷酸盐等样品的荧光寿命，测定的结果与标准样品值相符。 This article describes a laser fluorescence lifetime measurement device assembled from a nitrogen molecular laser, a small grating monochromator, a photomultiplier tube (PMT), a memory oscilloscope, and the like. The measurement principle and method of the device were discussed. The fluorescence lifetime of YAG crystal and vanadyl phosphate was measured. The measured results are consistent with the standard sample values.