利用相位信息确定来波入射角能达到较高的精度，基线越长，精度越高，但长基线会出现模糊性。从单基线测向模糊角的表达式出发，给出多基线测向模糊性的消除方法。计算结果表明，三基线系统只能应用于基线长度小于半波长的场合。文中方法能保证四条以上基线系统在很宽的频带内无模糊测向。若基线长度为１ｍ，无模糊工作频率可达９ＧＨｚ。 The use of phase information to determine the incoming wave angle to achieve a higher accuracy, the longer the baseline, the higher the accuracy, but the long base line will appear ambiguity. Starting from the expression of the single base-line direction-finding blurring angle, the method to eliminate ambiguity of multi-baseline direction finding is given. The calculation results show that the three-baseline system can only be used when the baseline length is less than half the wavelength. The method in this paper can ensure that more than four baseline systems have no ambiguity in a wide frequency band. If the baseline length of 1m, no fuzzy operating frequency up to 9GHz.