Temperature field of vertical ultrasonic vibration honing device is investigated by theoretical analysis and practical measurement. Test results show that the first heat source of vertical ultrasonic vibration honing device is the flexural vibration disc

and the second heat source is the ultrasonic amplitude transformer. By putting coolant on the flexural vi- bration disc and the output of ultrasonic amplitude transformer

the highest temperature is only 40℃.Workers may accept it. Meanwhile

the frequency fluctuation cna be reduced by 39.6%.