Abstract: In view of problem of unefficient effect of differentiated lightning protection measure adopted according to lightning distribution maps of 220 kV line of a mine, impact of wind speed on performance of lightning shielding failure of line was analyzed. The following reform measures of lightning protection were adopted combining with wind speed, direction and lightning distribution maps: install line arresters along the lee side of lines perpendicular to the wind direction to defend shielding failure; install anti-low grounding resistance and line arresters in areas which are belong to hazardous areas and whose lines are perpendicular to the monsoon direction to defend counterattack and shielding failure; reduce grounding resistance of tow in areas which are belongs to hazardous areas and not affected by the monsoon to defend counterattack. The actual operating results show that the lines have good lightning protection performance after reform.