Abstract: the paper introduced the working principle,technical parameters and experiment of structure optimization design of TBS,also described the application of TBS-3.6 coarse coal slime separator in Sanjiaohe coal preparation plant which separator optimization designed by Liaoning Tianan Mining Technology Co.,Ltd.With the application of TBS-3.6 coarse slime separator in Sanjiaohe coal preparation plant,effectively solved the issues of difficult to separation the coarse slime with the 2.0-0.25 mm size fraction.