Abstract: Wet cleaning of small coal can lead to difficulty in treatment of coal slime water and low composite calorific value of clean coal. To tackle this problem, a dry cleaning workshop is added at the plant for treating the 25～0 mm small coal with dry cleaning process. Assessment of the operating performance of the process indicates that the percentage of coal brought into refuse is 4.87% with a refuse removal rate of 82%, a heat efficiency of 90%, and the proportion of refuse getting into coal product is rated at 9.98%. Result of field application shows that after introduction of the dry cleaning system, 100 percent of the raw coal produced by Selian No.1 Mine can get treated by Selilan Plant.