Because of the activity randomness of the lightning and the complex environment of coal mine which cause the 35kV overhead transmission easily be struck by lightning,and it is difficult to determine the type of fault caused by lightning, leading the lightning protection measures targeted is not strong enough,substations and overhead lines can not be effectively protected. The paper introduced a research method of lightning protection in coal mine, 35 kV level transmission lines in the coal mine have been selected as the simulation research object by using the ATP-EMTP , and simulated the lightning invasion wave. Through comparison the results and let the use of line surge arrester of the lightning protection measures is of constructive significance.