Abstract: ESD (Electrostatic-discharge) caused by flight in the sky make the fuel tank of the aircraft catch fire andexplode which will disturb the communication and navigation system of the aircraft. In this essay, ESD on aircrafts isresearched, and the suppression of ESD is investigated. According to the imulation of the current density distribution of theaircraft surface, probe dischargers is proved to restrain aircrafts’ ESD. Then the size of probe dischargers which will contributeto the best model to inhibit ESD is analyzed and compared. At last, the effect of the electric fields caused by electrostaticcharges to the devices of the aircraft is studied. The simulation of the ESD radiation electric fields of the aircraft is verypractical to the optimization design of the aircraft, and will well predict the disadvantage of the electrostatic discharge.