Abstract:Based on the special physical properties of Hetian jade, highspeed steel twist drill was used with the diameter of 2 mm, 15 mm and 1 mm. Under selection of 700 r/min, 1 500 r/min and 1 800 r/min of drilling spindle speed, feed rate of 3 μm/r and 5 μm/r, machining tests were carried out separately with additional ultrasonic vibration and without additional ultrasonic vibration. In the process of drilling, tool wear, reaming hole, and the inner surface roughness of the three aspects were comparatively analyzed. Better processing quality and efficiency could be obtained by ultrasonic wave drilling. The wear and damage of drill can be reduced in hole processing, which provides a new method for precision machining of Hetian jide.