Abstract: Making experimental investigation of vibrating mode for the manufactured flextensional transducer and its shell, the result is in accordance with the theoretical calculations; making test of acoustical performance for the transducer:resonance frequency is 1.16 kHz in water, bandwidth is 680 Hz, mechanical quality factor is 1.71,unit electric current transmitting response reach to 186.1 dB,electromechanical efficiency is 13.1%.