Abstract: Coal slime increased year by year with mechanized mining in recent years. The technology can not deal with large numbers thermal coal. Large numbers of thermal just pile up. Thermal of Yulin can be separated by using 80% KD-4 /20% aids N and 2-Octanol as Foaming agent N. The flotation concentrate successfully improve concentrate of coal-water slurry from 60.5% to 65.31%. It achieve the most utilization of resources.