Abstract: A method of identification for low content chrysotile, crocidolite and amosite in brake rubber of bicycle by the united way of polarized light microscope and X-ray diffraction had been established. The preliminary break of sample, conditions of low temperature plasma incineration and compare with ashing efficiency in electric furnace, identification of asbestos using polarized light microscope and X-ray diffraction were studied, and the ruler of judging the exist of asbestos was ensured.

Key words: polarized light microscope%X-ray diffraction%low temperature plasma incineration%asbestos