The invention discloses a high-precision locating method for electric noise sources. The high-precision locating method includes: measuring sound field information near a noise source by a microphone array composed of a plurality of array elements in a certain shape, firstly subjecting the sound field information to conventional processing, acquiring sound images preliminarily, removing sidelobes which shouldn't contain from the sound images, and obtaining a series of more clear sound images composed of main lobes and realizing high-precision location of noise sources. On the basis of conventional wave beam forming method, reestablishment of the sound images after taking the maximum value of sound intensity, width of wave beam main lobes in new sound images can be designed, and sound source position can be indicated at high resolution. During iteration, affection on the sound images from sidelobes of strong sound sources can be alleviated, affection of the main lobes on the sound images is eliminated step by step, covered sound sources with low energy can be found, weak sound source covered by the sidelobes can be detected, and location correctness is improved.