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In order to determine the protection level and security spacing of lightning electromagnetic pulses around gas stations， based on the characteristics of lightning current and the explosive nature of oil combustion， the effects of the lightning electromagnetic field and the damage range of fire and explosion resulted from a nearby lightning stroke or a direct lightning stroke around the gas station are analyzed with the lightning monitoring data of the ADTD system， through assessing the lightning safety of the Chongqing Huaxing gas station. The results indicate that， if the distance between devices and station is 33.54 m to 41 m， the impact of the electromagnetic field generated by a lightning stroke can be neglected when the station is stroked by lightning; the using of the shielding grids less than 5 m×5 m is a condition of safety for the electromagnetic field of LPZ1 when the station is stroked by lightning; the distances of damaging range are 5.22 m and 138.95 m， respectively， when the station is on fire or explosive because of lightning. These provide a theoretical basis for the lightning protection and construction planning of a gas station and the surrounding area.