Abstract: To aim at the problem of the beam-space high-resolution bearing estimation algorithm,such as sensitivity to the big bearing estimation bias error,and so on,a broad-band high-resolution bearing estimation method combined with independent component analysis algorithm and beamforming was presented.(1) The independent component analysis algorithm based on second order statistics was used to process the beam-space data;(2) In order to obtain high-resolution bearing estimation,the array-space data were reconstructed using the result from the beam-space independent component analysis fusion method;(3) MUSIC high-resolution algorithm modified by constrained optimized method was used to estimate the target bearing for reconstructed array-space data.It also uses the ICS(Interactre Circuts & System) sonar simulator data and sea trial data to verify the proposed method.The results show the proposed method in the aspects of weak target detection,string interferance suppression and bearing resolution are better than the beam-space MUSIC method and the beam-space MVDR method.