The utility model relates to an optical cable is to ground apart from intelligent monitoring and forewarning device. The problem of the people who carries out the manual inspection existence to the optical cable to the ground distance among the prior art is uncertainty to reach current distance measuring equipment and can only fix a point to detect, can't detect the ground distance the whole piece optical cable is solved. The device includes optical cable, plumb -line, slide mechanism, controlgear, and controlgear includes distance detection unit, position analysis unit, the control unit, communication unit, and the solar energy power supply unit includes battery, solar film, solar energy spool, electric telescopic handle. The utility model discloses the advantage be can the enterprising line slip of optical cable and detect place all positions of optical cable to the ground distance for can understand the whole condition to the ground distance of audio -visual understanding optical cable more, the device is categorised to be acquireed ground distance threshold, makes the analysis more careful, and the early warning is more accurate, avoids appearing wrong early warning. Improve solar energy and gathered the area, better supplied power environmental protection and energy saving for the device.