The invention provides an automatic control lane fog light which comprises a base, a bracket, a fog light case, a power supply converter, a controller and a haze detection sensor, wherein the bracket is in a hollow cylindrical shape and is installed on the base, the fog light case is fixedly connected to the top end of the bracket, the haze detection sensor is installed on the fog light case, and the controller is arranged in the fog light case; the controller is respectively connected with the haze detection sensor and the power supply control end of the fog light case; the power supply input end of the lane fog light is connected with a UPS (Uninterrupted Power Supply) of a station control room through the power supply converter.