The invention provides a de-noising algorithm of laser range finding signals of a power transmission circuit based on the improved EEMD. Filtering analysis and de-noising processing carried out on noise-containing laser range finding signals of the power transmission circuit can be effectively achieved. The method comprises steps of firstly establishing a power transmission circuit laser range finding signal acquisition system; carrying out rapid EEMD decomposition on the power transmission circuit laser range finding signals obtained through the experiment so as to obtain a series of intrinsic mode functions IMFs; then, selecting different numbers of IMFs to carry out adaptive filtering de-noising according to different noise forms; and finally, adding the de-noised IMFs so as to reconstruct the expected power transmission circuit laser range finding signals. An experiment result proves that by use of the method, noise in the power transmission circuit laser range finding signals canbe effectively reduced; rapid and precise range finding can be performed on targets influencing operation of the power transmission circuit; and safety and stability of the operation of the power transmission circuit are improved.