The mineral composition and microstructure of the parting of Guanbanwusu mining area in Jungar Coalfield were analyzed with X-ray diffraction, Fourier transform infrared spectrum and Scanning electron microscope. The results indicate that partings are widely distributed in the bottom layer of No.6 coal seam of the Guanbanwusu coal mine, showing lamellar output. The main mineral in the partings is kaolinite followed by a very small amount of boehmite and other minerals. The molar ratio of SiO₂/Al₂O₃ is approximately 2.00~2.10, which is close to the theoretical ratio of the kaolinite group minerals. The sample has a low content of Fe and Ti. The single-crystal form of kaolinite is mainly hexagonal plate, flaky stacked polycrystalline, as shown by scanning electron microscope. The size of the single-crystal is less than 5 μm. The kaolinite in the gangue of the Guanbanwusu mining area has high crystallinity, which can be used to produce ceramics.