为实现声目标的被动定位，提出了一种平面圆阵的定位方案，并利用最小二乘原理导出了多阵元模型的定位算法。该算法不仅能对空中目标进行定位，而且也能对地面目标进行定位，同时该算法消除了目标方位变化对测距精度的影响，因而具有较好的测距能力。计算机数值计算和仿真结果表明，该系统具有较好的定位性能。 In order to realize the passive positioning of the acoustic target, a planar circular array positioning scheme is proposed and the multi-array element localization algorithm is derived by using the least square principle. The algorithm not only can locate the target in the air, but also can locate the target on the ground. At the same time, the algorithm can eliminate the influence of the change of the target azimuth on the range precision, so it has better capability of ranging. Computer numerical calculation and simulation results show that the system has better positioning performance.