The invention discloses a modeling method suitable for an equivalent circuit of an electro-acoustic longitudinal vibration transducer. An overall equivalent circuit of the electroacoustic longitudinalvibration transducer comprises a first equivalent circuit of an alternating current coil, a second equivalent circuit of a series circuit of a direct current bias coil and a linear direct current power supply, a mechanical equivalent impedance network and a three-winding equivalent transformer. According to the method, by constructing the first equivalent circuit, the second equivalent circuit, the mechanical equivalent impedance network and the three-winding equivalent transformer respectively to obtain the integral equivalent circuit finally by integration, the actual winding method of thethree-winding equivalent transformer does not need to be considered, meanwhile, by considering the influence of the second equivalent circuit on the impedance of the electro-acoustic longitudinal vibration transducer, the method has certain universality on the electro-acoustic longitudinal vibration transducer, and the impedance characteristic of the electro-acoustic longitudinal vibration transducer can be well reflected, so that the response of the overall equivalent circuit is relatively accurate, and further, guidance is provided for impedance matching between the power amplifier and the electro-acoustic longitudinal vibration transducer.