Abstract: In order to explore the method and feasibility of industrial separation maceral of non-cohesive coal and weak cohesive coal in Ningdong Minefield. The floating-sinking centrifugal method was used to separate inertinite in maceral of cleaned coal from Yangchangwan Coal Mine Preparation Plant by centrifugal method with zinc chloride solution close to the density critical point of the various maceral types. The result show that the particle of grinding is more finer, the more favorable to increase the yield of the product close to the density of inertinite. The relationship of the elemental analysis and volatile matter between the known maceral and the separated product is similar but some different. The characteristic of FTIR spectra of 1.34g/cm3~1.38g/cm3 and >1.38g/cm3 density grade's products are similar to inertinite’ s. The results of maceral analyses show that the products with 32.23% and 40.35% inertinite, and its remainder with 57.31% and 63.9% inertinite are separated by floating-sinking centrifugal method according to zinc chloride solution of the density grade of 1.34g/cm3 and 1.38g/cm3. To a certain extent, the purpose of separating and removing inertinite in maceral is achieved.