In order to achieve rapid classification of plastics,the technology of laser-i nduced fluorescence is applied to classify and discriminate the materials of different plastics.The fluorescenc e spectra of nine kinds of plastics are detected by laser-induced fluorescence measuring system, in which an ND: YAG solid-state laser with emission wavelength of 266nm is used as the light source and Ocean Maya2000Pro spectrometer is used as the fluorescence detection device.T he obtained fluorescence spectra are averaged and smoothed to eliminate the dat a error and reduce the spectral noise.Nine kinds of plastic samples are clustered with the Euclidean distance of the spectral characteristic values.The results show that the cluste ring of plastics which contain the same elements is better,of which five kinds of plastics contai ning only C,H are clustered as a group,while the remaining four kinds of multi-element plastics a re classified as another category.The number,location,intensity of the fluorescence peaks can be used as the basis for plastic identification.The experimental results show that the lase r induced fluorescence spectroscopy can be used to classify and discriminate t he materials of plastics.