In order to solve the problem of reduce rotor is vibration under high rotary speed, discuss the principle and the method of high speed dynamic balance and carry out the high speed dynamic balance of certain type turbofan engine rotor. The test result shows that the high speed dynamic balance can effectively reduce the rotator vibration, and the multi-surface and multi speed influence index method is useful for the one level and two level high speed dynamic balance of flexible rotator. It is directive to the same kind of rotors and possesses significant engineering use value.