The invention discloses a method of processing Rhinacanthus nasutus (L.) Kurz for producing a processed sample of Rhinacanthus nasutus (L.) Kurz with improving active ingredients, wherein the method comprising the steps of: soaking a raw sample of Rhinacanthus nasutus (L.) Kurz with a processing reagent at 22 to 37° C. for 12 to 36 hours and boiling the soaked product at 1 atm, 95 to 105° C. for 15 minutes to 1 hour to obtain the processed sample of Rhinacanthus nasutus (L.) Kurz.
