Abstract: In order to solve the problems of inconvenient movement of measuring device and the difficulties to locate the position and depth of buried grounding conductor in the diagnosis of grounding network corrosion of power equipment,grounding conductor location method based on array anisotropic magneto resistance（AMR）magnetic sensor is proposed. Firstly,the electromagnetic induction principle is used to determine the optimal distance between array sensors. Then,an experimental device is set up to verify the rationality of the calculated distance between sensors. Finally,two equivalent models of inflection point of single grounding conductor and mouthshaped grounding net are established. Based on the depth inversion formula,it can be known that the deviation between the calculated depth and the actual depth of grounding conductor is less than 0.0964 m in the range of 0.4 ～1 m detection depth. Experimental results show that the proposed location method can be applied to engineering practice.