Video frequency signal interference device

The utility model relates to a video frequency signal interference device, belonging to the field of protection products, which comprises the signal processing circuit of a signal source end and the signal processing circuit of a monitoring end; the signal processing circuit of the signal source end comprises a main circuit board (1), a power supply interface (2), a power supply filtering module (3), a video signal input interface (4), a video signal filtering module (5), a video signal magnify module (6), a video signal modulation module (7), a video signal output interface (8), and a plastic package box (9); the signal processing circuit of the monitoring end comprises a video signal input interface (10), a video signal noise reduction module (11), a video signal output interface (12), a circuit board (13), and a plastic package box (14). A video frequency signal interference device comprises the signal processing circuit of the signal source end and the signal processing circuit of the monitoring end jointly. The utility model can be used for eliminating the wired video signal disturbance in region monitoring systems in factories, residential areas, markets, parking places and substations and prolonging the transmission distance of video signal.