Abstract: Brown extract particles (XLE) were obtained by extraction and anti-extraction from Xilinhaote lignite (XL) with carbon disulfide and N-melthy-2-pyrolidinone (CS₂/NMP) mixed solvent. Then the XL and XLE were oxidized respectively with 30% (mass fraction) hydrogen peroxide at 60℃, and the structure and composition of oxidation products were analyzed with Fourier transform infrared spectrometer (FTIR) and gas chromatography/mass spectrometer (GC/MS). The results indicate that the extraction products show small particles with nanometer size, both XL and XLE show excellent oxidative degradation.A series of oxygen-containing species such as alcohols, aldehydes, phenols, acids, ketones, ethers and esters are detected after oxidation. Compared with XL, more kinds and contents of oxygen-containing species can be detected from XLE.