Abstract: The method for bearings-only target motion analysis (BO-TMA) based on bearing measurements fusion of two arrays is studied in this paper. The algorithms of pseudolinear processing, extended Kalman filter and maximum likelihood estimation are presented. The results of simulation experiments have shown that this TMA method based on association of multiple arrays not only makes contributions towards eliminating maneuvers needed by bearings-only TMA based on single arrays, but also improves the stabilization and global convergence for varied estimation algorithms.