Abstract: In order to limit the vibration of the shaft bearing subsystem and improve the machining accuracy of machine tool in the high-speed movement, a method was proposed based on controlling the amplitude and phase of the rotor of the tilting pad bearing to reduce the amplitude in the front end of the spindle. Firstly, a five-degree-freedom vibration model was established for the rigid rotor system and a differential equation was conducted to solve rotor system vibration. Then,a flow balance method was used to obtain the feed flux, a discrete Renault equation was taken to analyze the oil film force of the tilting pad bearing, an Euler method was used to get the rotor trajectory of the tilting pad bearing, and a linear equation of space was taken to obtain the trajectory of the front rotor of the spindle. Finally,an electromagnetic actuator was used as an auxiliary control device to adjust the tangential acceleration and normal acceleration of the tilting pad bearing rotor. The simulation results show that, the rotor trajectory can converge to a circle and can reduce the phase difference of the front and rear bearings. The amplitude of the front end of the spindle can be reduced by 60.26%.