Abstract: This paper studied the ultrasonic technology applied in wool scouring with water.The effects of scouring temperature,time and dosage of detergent on the quality of the scoured wools of different diameter were investigated.The results were compared with that of the traditional wool scouring and it was found that the ultrasonic wool scouring can achieve the same quality level as the traditional,but it needs less time and has higher efficiency.However,it is observed by scanning electron microscope(SEM) that the ultrasonic process results in etching effect on wool scales,thus damaging them to certain extent.