The invention provides a voice warning and networked alarm system for social vehicle jam at a substation gate. The voice warning and networked alarm system comprises a video camera, and is characterized in that the video camera is connected with a front-end control device, the front-end control device is connected with a local computer, and the local computer is connected with an alarm device. According to the invention, on the premise of not affecting normal traffic in front of a substation gate, a traffic-dedicated vehicle plate identification video camera, a loudspeaker, an electronic display screen and other equipment are employed to timely identity, warn and expel social vehicles parking illegally in order to ensure smooth traffic in front of the substation gate, clear away obstacles for operation maintenance and accident emergency handling and guarantee safe operation of power facilities.