Abstract: To improve the high resolution performance of azimuth angle estimation using an Acoustic Vector Sensor Array (AVSA),a MUSIC algorithm based on AVSA was carried out.The pressure and particle velocity cross-covariance matrix was constructed for the MUSIC algorithm.Theoretical analysis,computer simulations and result of lake experiment show that the proposed algorithm is more effective than existing algorithms in resolution and accuracy in the case of low signal-to-noise ratio (SNR).The algorithm is based on the principle of coherency between pressure and particle velocity,which can suppress interference better than existing algorithms in isotropic noise field.Using the MUSIC algorithm,the AVSA obtains much more gain and has advanced performance in azimuth angle estimation.