In order to understand the temperature of the cutting zone in the process of bone drilling,the 3D drilling problem was transformed into twodimensional cutting problem.A twodimensional orthogonal cutting model was established.The temperature change of the third deformation zone during bone drilling was analyzed.The simulation model of ultrasonic vibration orthogonal cutting was established by ABAQUS software.The correctness of the simulation model was verified by experiment.Through the simulation model,the temperature changes of the third deformation zone by ordinary drilling and ultrasonic vibration drilling were compared and analyzed.The effect of rotational speed on the temperature of the third deformation zone of cortical bone under ultrasonic vibration condition was further analyzed.The results show that the ultrasonic vibration drilling can significantly reduce the temperature of the third deformation zone compared with the ordinary drilling,and the temperature of the third deformation zone increases with the increase of the rotational speed.