Abstract: A method to change frictional characteristics proposed based on ultrasonic micro driving technique.Exciting clockwise and anticlockwise microscopic elliptical motion of driving points on the ultrasonic transducer's two longitudinal bolt-clamped vibrators will change the nature of friction and generate ultrasonic lubricant;furthermore,the friction can be active controlled by adjusting the vibrators' vibrating amplitude.An experimental installation for friction control is designed using aerostatic guide,force sensor,low speed motor.Fuzzy control theory is used in this system,the experiment results indicate the friction has been lessened largely,the friction coefficient reaches 0.0053 when the total mass of ultrasonic transducer and load is 3.8 kg and the motor's driving speed is 0.5 mm/s.