Several methods were employed to explore the composition of Mongolian medicine magnetite.Fourier transform infrared spectroscopy(FTIR) and X ray diffraction(XRD) were used to determine the spectra of 10 batches of sample from different manufacturers,while elements in magnetite were quantified by inductively coupled plasma mass spectrometry(ICP-MS).Therefore,seven characteristic peaks were found in the infrared spectra for the magnetite,and the characteristic absorption peaks for quartz and Fe3O4 were at 468 cm-1 and 526 cm-1,respectively.Nine characteristic peaks were detected in XRD experiment.The data of peak 5,7,8 and 9 in the spectrum for magnetite were consistent with those of Fe3O4,while the data of the peak 3 and 4 were consistent with those of SiO2.Meanwhile,ICP-MS was used to quantify 24 elements in magnetite.Results showed that the content of Fe was found to be the highest,and other heavy metals and harmful elements were also detected.FTIR,XRD and ICP-MS could be used to identify the structure of magnetite,which lays a foundation for the quality analysis of magnetite.