Abstract: In this paper the equivalent circuit transformation and multi-physics field finite element simulation is used to research the characteristics of piezoelectric acoustic transducer with broadband matching performance, and the variation of electro-acoustic characteristics of the transducer with different matching circuits is obtained. By reasonably choosing the values of inductance and capacitance as well as the way of series-parallel connection, the double-humped response is achieved to broaden the working frequency range, and to improve the transmitting voltage response (TVR) and reduce the fluctuation in the working frequency range. According to the simulation data, a transducer is designed with the tuned matching using series inductance. The performance difference of the transducer before and after matching is tested. The test results are in agreement with the simulation calculation. It means that the multi-physics field simulation calculation has good guiding significance for predicting and analyzing the performance of underwater acoustic transducer.