Vibration exciter and using method thereof

The invention relates to a vibration exciter and a using method thereof. The vibration exciter comprises a vibration exciting shaft and an eccentric block, wherein the vibration exciting shaft comprises a central rotating shaft and an outer ring rotating shaft, the outer ring rotating shaft sleeves an axial through hole, the central rotating shaft is arranged in the axial through hole of the outerring rotating shaft, the central rotating shaft and the outer ring rotating shaft are coaxially arranged, the central rotating shaft is provided with first eccentric blocks, and the outer ring rotating shaft is provided with second eccentric blocks. When the vibration exciter is started, the excitation force is zero, the vibration exciter can be started stably, after the vibration exciter reachesa rated rotation speed, required excitation force and amplitude can be obtained by adjusting the relative position angle of the eccentric blocks, before vibration equipment is stopped, the excitationforce is adjusted to be ze