The basic transmission characteristics of Ultra Wide Band(UWB) nanosecond electromagnetic pulse signal via microwave receiver Band Pass Filter(BPF) is explored on time domain and frequency domain by using simulation calculation and experimental methods. It is the complement to the transmission characteristics study of traditional Continuous Wave(CW) signal and pulse modulation signal through microwave BPF. A preliminary law of transmission characteristics of UWB nanosecond electromagnetic pulse signal through microwave BPF is obtained, which can provide technical basis for the future applications of UWB nanosecond electromagnetic pulses in all kinds of receivers.