This　paper　briefly　introduces　the　pulse　transformer　and　its　main　technical　indicators,　analyzes　the　influence　of　parasitic　parameters　on　the　output　waveform　of　the　pulse　transformer　from　the　time　domain,　and　obtains　the　values　of　delay　time,　overshoot　voltage　and　top-drop,　which　provides　reference　for　the　design　of　the　pulse　transformer.　A　pulse　transformer　with　smaller　leakage　inductance　and　parasitic　capacitance　is　proposed,　which　can　have　faster　response　speed.　©　2022　IEEE.