The utility model discloses a substation virtual work fence which comprises two cameras disposed on the site of a substation. The two cameras have overlapping photographing ranges, and different photographing positions. The two cameras are connected to a video analysis server through a wifi and a wireless router. An acquired image is transmitted to the video analysis server. The video analysis server is connected to a video management server through a 3G network. The video management server communicates with a smart phone. According to the utility model, the substation virtual work fence is reasonable in structure; a virtual fence is added on the basis of an original physical work fence of the substation, one more protective measure is taken for the safety of working staff, and the virtual work fence will not change due to manual movement of the physical fence; and after set up before work, the substation virtual work fence will work in a pre-set area the whole day, the safety of the working staff in the working area can be improved, and the personal injury and property loss due to negligence are avoided.