Abstract: Sensors such as a current probe or an antenna are usually needed in a current or electromagnetic pulse measurement,and the primary data obtained by the oscilloscope must be corrected with the transducer of the sensors to get the waveform of the original pulse.To compensate the phase information missed during the correction due to the transducer which is usually given in the form of frequency and magnitude,method of minimum phase is introduced.Hypothesis of minimum phase system is made,by which the process of signal reconstruction is discussed based on Hilbert Transform.Measurements are carried out to test the validity of the reconstruction on pulses used widely in electromagnetic compatibility(EMC)test,and calculated results showed well coherence with the direct measurements.Such a method can be used to determine the threshold level in a pulse susceptibility test,and is also useful for reconstruction of the electromagnetic pulse received by an antenna.