The invention discloses a cable damage prevention video monitoring system, which comprises a monitor and a plurality of cameras, wherein a digital signal output end of each camera is connected to the input end of a gateway through a data transmission line, the output end of the gateway is connected to the input end a digital signal converter, the output end of the digital signal converter is connected with the input end of a video server, an image display interface of the video server is connected to the monitor, a data storage interface of the video server is connected to an external storage server, a power input end of each camera is electrically connected with a power taking ring, and the power taking rings are installed at the periphery of a cable; the outer side of each camera lens is provided with an accumulated dust blowing and cleaning mechanism, and the accumulated dust blowing and cleaning mechanism is internally provided with a fan. The cable damage prevention video monitoring system integrates multiple functions effectively, thereby being convenient for expansion and upgrading in the future; equipment such as the cameras and the like are powered through inductive power taking of the power taking rings, a problem of field power taking is well solved, and the cost is saved; and the accumulated dust blowing and cleaning mechanism is arranged, thereby being capable of avoiding potential safety hazards brought about by manually cleaning the cameras, saving the maintenance cost, and improving the imaging quality.