500 kV transmission lines are always located in thousands of miles of wilderness, The height of the pole tower, the protection angle of the lightning protection, and the slope of the ground of the pole tower are directly related to the lightning strike. The higher the height of the pole tower, the stronger the inductive performance, and the greater the voltage amplitude generated by the lightning wire through the tower. The greater the protection angle of the lightning line, the more lightning around the strike area will increase, and the number and probability of winding will increase accordingly. The higher the slope of the ground, the more arcs the transmission line is exposed to, resulting in increased inductive sensing. When the line follows the slope to the pole tower, the side bypass area inside the slope is less, but the outside is increased, and the size of the bypass area directly affects the number of lightning strikes. A large number of data show that the probability of lightning strikes will be quite high due to the terrain causing the arc section of the line to be too large and the protection angle of the lightning line to be too large. Some areas are prone to lightning strikes because of the large amount of conductive minerals underground. Due to a large number of underground quality, and the cloud has the opposite charge, while the pole tower forms the earth's "tip discharge", and the cloud's inductive enhancement, coupled with the rod tower and wire are good conductors, the line itself has its own charge, which is very easy to lead to lightning strikes. Lightning is a phenomenon of atmospheric discharge. A large number of positive or negative charges gather in different parts of the cumulonimbus cloud to form thunderstorm clouds, and the ground will also be opposite to the polarity at the bottom of the cloud will also be opposite to the polarity at the bottom of the cloud. When the charge accumulates to a certain intensity in the cloud, it breaks through the air and opens the narrow channel to force the discharge. As the clouds discharge, because the current in the clouds is very strong, the instant air in the passage will be burned, the temperature is as high as 6000-20000℃, so there is dazzling light, which is lightning, and lightning will expand the balloon at high temperature.