The invention discloses a novel vibrator comprising a piston rod, a roof plate, a hammer, and a flat plate. The upper end of the piston rod is fixed to the roof plate, and the lower end of the piston rod is fixed to the flat plate. An upper hydraulic oil channel and a lower hydraulic oil channel are arranged inside the piston rod. Electro-hydraulic servo valves are connected to the inlets of the upper hydraulic oil channel and the lower hydraulic oil channel. Support rods are arranged between the roof plate and the flat plate. The support rods all penetrate through the hammer. A bushing is installed in the center of the hammer. The piston rod passes through the center of the hammer. The beneficial effects are as follows: as the oil channels are arranged inside the piston rod, rotational torque produced by oil to the vibration part is avoided, the bending deformation of the support rods is avoided, the resistance of vertical movement of the hammer is reduced, the output force of a vibration source is increased, random noise interference generated by a vibration source structure is eliminated, and the signal-to-noise ratio of excitation wave of a vibration source is improved.