Abstract: This present research concerns in the scandate cathode electron gun emitting electron beams under double nanosecond order pulses high voltage condition. Double nanosecond order high voltage pulses were feed in the scandate cathode electron gun by the Blumlein line method, each with pulse flat-top for 80 ns and the time interval of double pulses for 300 ns. Experiment results show that the shapes of measuring beam currents by the Faraday cup accord with the ones of nanosecond order high voltage pulses feeding in the gun. The scandate cathode electron gun can be the multi-beams injector under nanosecond order pulse working condition because its electron beam emitting response ability for the nanosecond order pulse can satisfy with the double short pulses working condition.