Abstract: A method for treating the lower extremity varicose vein combined ultrasonic wave and microwave is provided. The method includes steps of firstly finding the diseased vein by the ultrasonic imaging equipment; and then directly effecting the microwave treatment catheter/needle on the diseased vein; by the concentric thermal coagulation release effect of the microwave to the tissue, instantly generating high temperature with the certain penetration range in a small range for tissue coagulation; and then gradually making the vascular fibrosis; finally making the completely atresia, thus achieving the therapeutic aim. The present invention uses the ultrasonic imaging microwave treatment technique to treat the lower extremity varicose vein disease.