The invention relates to a watertight packaging type ultrasonic cleaning transducer which solves the problems of proneness to damage, difficulty in maintenance, low cleaning efficiency and the like of existing cleaning transducers. The transducer comprises a front cover plate, a rear cover plate, a positive electrode plate, a negative electrode plate, a first annular piezoelectric ceramic piece and a second annular piezoelectric ceramic piece, wherein the positive electrode plate, the negative electrode plate, the first annular piezoelectric ceramic piece and the second annular piezoelectric ceramic piece are locked between the front cover plate and the rear cover plate through a prestressing screw rod. The positive and negative electrode plates are connected with wires which are serially connected with a matching inductor. A sealing layer composed of poly propylene glycol ether polyurethane rubber is poured outside the integral structure, and the thickness h of the sealing layer packaged on the front end face of the front cover plate is one quarter of wavelength of sound waves given out by the transducer. The watertight packaging type ultrasonic cleaning transducer is reasonable in material selection, simple in sealing process, low in cost, high in reliability, easy to maintain and convenient for arraying, and further, the matching inductor is added, so that energy sources are saved, and cleaning efficiency is improved.