The invention belongs to the technical field of lightning protection, and provides a mechanical self-destruction video monitoring lightning protection device. The lightning protection device mainly comprises a self-destruction switch assembly, wherein the self-destruction switch assembly comprises a constant speed motor which is connected with a power supply input end and provided with a first gear; the first gear is engaged with a second gear; the second gear is engaged with a third gear; a fourth gear is coaxially arranged on the third gear, and horizontally engaged with a fifth gear; a moving electrode is arranged at the upper end of the circumference of the fifth gear, and contacted with the lower surface of a static electrode; and the upper surface of the static electrode is contacted with a power supply output port. A preferable transmission ratio structure can achieve a function of cutting off an output power supply when an age limit is reached, so that the power supply can only be input but not be output, and a surge protection device is forcefully scrapped. The lightning protection device is simple in structure and high in cost performance, and well prevents waste and out-of-date products from being put into operation.