The preparation of kaolinite samples of coal measures needed to meet the using of power ul—trasonic peelling is made at first.Then, the peelling tests by power ultrasonic were taken under the various condition of concentration of kaolinite.the surry volume and the action time.The factors which influence peelling of kaolinite such as concentration of kaolinite in the peelling process, the surry volume and action time were discussed.It SHOWS that in order to obtain the desired peelling re—sults, we should select the appropriate parameters of concentration, surry volume and action time. Theoretical analysis of power ultrasonic peelling mechanism were made, and the relationships among cavitation threshold pressure PB, liquid surface tension, the transient pressure when the collapse of the cavitation bubbles, transient temperature and SO on were presented.