Abstract: The paper starts with an elaboration on the difficulties faced by Xingtai Energy Company′s coal preparation plants in the operation of the fine coal sizing process. Then an analysis is made of the effects obtained in the process of removal of fines from the overflow of coarse coal slime separators with the use of the traditional sizing equipment commonly applied in 3 coal preparation plants in Xingtai Mining Area, as well as the novel laminated high-frequency vibrating screen and the EPS high-efficiency fine screen. Result of analysis shows that the use of the latter two screens can lead to optimization of flotation feed, lessening of workload of flotation system, drop of ash of cleaned coarse slime, effective elimination of unnecessary increase of ash of clean coal product of heavy medium separation system, and improvement of the system′s separation efficiency.