In this paper, the active vibration control for highly flexible cantilever under the impact force is studied by using the PZT as actuators and the independent mode control method, and the active control experiment is performed about the three mode vibration of the flexible beam. The experiment results show that the vibration of flexible cantilever beam can be effectively suppressed by using the independent mode control method. Using the mode filter to separate the vibration mode and phrase controller to adjust the phase of mode response, the greatest damping of the flexible beam and the excellent vibration control effect can be obtained.