Abstract: An matched algorithm based on acoustic interference structure is proposed to estimate the target motion parameters.The algorithm is based on the longitudinal-correlation of the acoustic field.Using the spectral vectors of different frequencies obtained from the target radiated noise spectrum,and the target range solution vector calculated from the two-azimuth and two-range method,a matching cost factor of the spectral vectors similarity is constructed to estimate the target motion parameters.Both the numerical simulation and the experimental data analysis indicate that the initial range,course and speed can be clearly presented in the visualization distribution of target motion elements.The results demonstrate that the algorithm is simple,efficient and robust to the azimuth errors.