The invention relates to ultrasonic radiators, in particular to a high-power three-dimensional vibrating ultrasonic radiator, solving the problem that ultrasonic frequency vibration generated by existing ultrasonic radiators can be only spread in a two-dimensional direction. The high-power three-dimensional vibrating ultrasonic radiator comprises a radial piezoelectric vibrator and an axial piezoelectric vibrator; the radial piezoelectric vibrator comprises an outer prestressed metal cylinder, a circular urethane rubber pad, a cup-shaped end cap, a circular-truncated-cone-shaped fluoroelastomer expansion core, an inner prestressed metal press bock, a round-tube-shaped inner electrode, a radially polarized piezoelectric single crystal block, a round-tube-shaped external electrode, a first pre-tightening bolt and a truncated-cone spiral spring; the axial piezoelectric vibrator comprises a rubber spring, a second pre-tightening bolt, a round-tube-shaped cover, a round-tube-shaped piezoelectric piece set, a combined variable-amplitude rod, a fastening joint disc and a round-tube-shaped envelope. The high-power three-dimensional vibrating ultrasonic radiator is applicable to various fields, particularly to coalbed methane extraction.