The invention provides a method for monitoring and early warning of mountain fire in electric network based on geosynchronous orbit satellite. The method comprises the following steps: obtaining remote sensing image of the geosynchronous orbit satellite; analyzing the remote sensing image by GIS monitoring platform; obtaining video data of a field camera in a first region after confirming suspected mountain fire disaster; and confirming the mountain fire disaster situation. At the same time, through the particle algorithm of simulated flame, combined with wind speed and wind direction data, real-time calculation of hill fire spread range, and forecast the hill fire arrival time of power grid facilities. The invention monitors the mountain fire disaster situation through the double confirmation mode, improves the accuracy of the monitoring, and starts the field camera after the suspected mountain fire disaster information is confirmed, thereby reducing the transmission amount of the data. It realizes the prediction of the time when the fire arrives at the power grid, and improves the efficiency of rescue.