Abstract: Low frequency,wide band,high power transducer is a key technology of modern underwater acoustics.Match between the transducer and the amplifier is a key technology for a wide band high power underwater acoustic transmit system.In this paper a kind of wide band matching network is discussed,through the matching network,we can improve the matching efficiency as well as the working band.The paper also gives a network used matching one amplifier with two wide band transduces.