We　have　found　that　strong　superchiral　fields　created　by　surface　plasmon　resonance　exist　in　hot　spots　of　nonchiral　plasmonic　structure,　which　showed　a　chiral　density　greater　than　that　of　circularly　polarized　light　by　hundreds　of　times.　We　have　demonstrated　a　direct　correlation　between　the　strong　chirality　of　the　local　field　and　the　giant　CD　response　at　the　plasmon　resonance　bands　induced　by　chiral　molecules　in　the　hot　spots.　Our　results　reveal　that　the　wavelengthdependent　superchiral　fields　in　the　hot　spots　can　play　a　crucial　role　in　the　determination　of　the　plasmonic　CD　effect.　This　finding　is　in　contrast　to　the　currently　accepted　physical　model　in　which　the　electromagnetic　field　intensity　in　hot　spots　is　a　key　factor　to　determine　the　peak　intensity　of　the　plasmonic　CD　spectrum.　Some　related　experimental　phenomena　have　been　explained　by　using　our　theoretical　analysis.　©　OSA　2016.