The ultrasonic transducer adopts the high steady piezoelectric ceramic chip and the design of front and back cover with best acoustic matching. The production produced has some features as follows: A. low resonance impedance B. high Q mechanical value C. high efficiency of mechanical and electrical transforming D. good hot staility E. low calorific capacity F. good consistency of frequency and static capacitance G. large amplitude, high vibration speed. The production has a good variety, and can be used widely in all kinds of ultrasonic cleaning equipments.