The invention relates to an electric power facility external damage prevention warming scheme based on the video motion detecting technology. The scheme comprises, after frame by frame reading the images of a video detected by a camera and setting a corresponding threshold value system according to the time, processing a series of the frame images of the video to extract the integral contour of an electric power facility and the virtual coil on the entire video images; then determining detecting areas; performing background extraction and update in all the detecting areas through a mixed Gaussian distribution background model; obtaining the foregrounds of the detecting areas through a background substraction method; comparing the pixel data of the foregrounds of the detecting areas with the corresponding detecting threshold values of the threshold value system; if the foreground pixel data exceed the range of the threshold values, issuing a warning signal to perform background update and foreground detection timely and accordingly ensure the real-time performance and the continuity of video detection.