The invention discloses a fog zone induced adaptive lamp frequency control device based on wavelength division multiplexing. The device comprises a core control module, a wavelength division multiplexing module and a plurality of terminal guiding unit modules, wherein each terminal guiding unit module is provided with a corresponding coupling module, the terminal guiding unit module is connected with the coupling module through a connecting fiber, the core control module is connected with the wavelength division multiplexing module through a transmission fiber, the wavelength division multiplexing module is connected with the nearest coupling module, the coupling modules are connected by a connecting fiber, and a lamp bank is arranged at the outermost layer of the terminal guiding unit modules. According to the technical solution, different terminal guiding unit modules are accurately synchronized through a time difference algorithm, and a lamp bank flicker frequency with stronger adaptability is set through visibility acquisition instruments at different locations, so that the stability of the system is improved, and the device is more suitable for long-distance uses.