Bearingless motor is a nonlinear multivariable system with a strong coupling. In this pa?per, a decoupling control approach has been developed for a bearingless motor to drive a synchro ul?tra-high-speed camera. A nonlinear controller based on dynamic feedback linearization is designed such tnat the nonlinear system with strongly coupled motion is reduced to four decoupled normaliza?tion linear subsystems，including two rotor displacements and its speed as well as rotor flux. Linear system theory is utilized to improve the transient performance of these normalization linear subsys?tems. To verify the effectiveness of the control scheme, some simulations have been employed, and satisfactory performance of the decoupled system is obtained.