Using potassium acetate as intercalation reagent,the kaolinite-potassium acetate complex was prepared.The basal spacing of raw kaolinite enlarged from 0.714nm to 1.42nm and its intercalation ratio was about 80%.The power ultrasonic peeling test was taken with instability of kaolinite-potassium acetate complex.The effects of surry volume,surry concentration and processing time on peeling were discussed under certain power ultrasonic circumstance.It is shows that the best peeling result was got in 200 mL surry volume,10% surry concentration and 15 min processing time under the power ultrasonic condition of 150W,18kHz and with 100 mm end diameter of horn.That the fluid shock wave and the enormous particle acceleration generated by acoustic cavitation is a fundamental cause for peeling of kaolinite-potassium acetate complex.Also,high velocity impact among kaolinite particles in fluid makes much more fine power.