Abstract: Abstract: by analyzing the field screening and floating data, comparison of three kinds of coal preparation plan, and ultimately determine the pre desliming and non pressure feeding three product heavy medium cyclone separator +TBS + flotation separation process. Coal pre desliming process is complex, but can reduce the pressure of heavy medium system, reduce the flow rate; TBS fluidized bed coarse coal slime separation makes the whole process more perfect and better separation effect, cost is in coal preparation conditions, increase the profits of coal preparation plant.