Abstract:To meet the needs of low residual, high precision, large range, high timeliness wildfire point near the real-time monitoring for transmission line fire prone areas, this paper put forward a fire detection algorithm based on MC - CNN.with the earth synchronous orbit satellite images.The main characteristic of this algorithm are as follows:By taking OTSU algorithm with the context of two kinds of algorithm union set to further increase the possibility of potential point, which to a certain extent, reduce the residual rate of fire detection;Get weights of different channel fire point recognition by optimizing the input features with the PCA algorithm, building a multichannel network structure and optimization algorithm based on joint probability and PSO parameters ,and determine the fire on the basis of the weighted average finally.This paper randomly selected the satellite monitoring history fire case near transmission line from 2019 to 2022,and inverse analysis the effectiveness of the proposed algorithm by using samples of known fire points,results show that the calculation for the fire detection accuracy is 89.4%.