This work proposed a method to separate the low-frequency magnetic interference induced by the electrical equipment during geomagnetic navigation process.Firstly,the branches of a circuit are divided into several independent interference source based on electrical analysis,and the attitude of the carrier is regulated to make sure that the total strength measured along each sensor’s axis is the linear superposition of all field components(including geomagnetic field and interferences).Secondly,to compensate the ambiguity drawbacks of Independent Components Analysis(ICA) method,the absolute value of correlation coefficient is proposed to perform map matching.Both theoretical deduction and simulation results have proved the efficiency of the method.