Bandwidth　of　10/350　μs　direct　lightning　stroke　current　is　from　several　Hz　to　1　MHz,　waveform　distortion　at　low　frequency　section　will　occur　when　this　current　is　measured　by　normal　Rogowski　coil　due　to　its　small　self-inductance.　In　this　study,　a　self-integral　Rogowski　coil　with　magnetic　core　was　made.　An　experimental　comparison　with　coaxial　tube　shunt　was　conducted　on　the　platform　of　10/350　μs　impulse　current　generator.　The　results　indicate　that　the　self-inductance　of　the　self-integral　Rogowski　coil　is　clearly　enhanced,　and　its　lower　limit　of　frequency　is　extended　because　of　the　magnetic　core.　The　theoretical　bandwidth　of　the　self-integral　Rogowski　coil　is　from　2.182　Hz　to　2.924　MHz.　10/350　μs　impulse　current　waveform　below　82　kA　can　be　measured　exactly.　The　errors　of　rise　time,　real　time　and　current　amplitude　are　all　below　2%.