To identify the Dryopteridis Crassirhizomatis Rhizoma as the main research object, based in DNA molecular level psbA - trnH and rbcL sequence of DNA molecular identification of the Dryopteridis Crassirhizomatis Rhizoma, and accumulated a lot of ferns in the experiment psbA - trnH and rbcL sequence, for related research to provide more reference (reference sequence);Dryopteridis Crassirhizomatis Rhizoma medicinal materials on metabolic marker levels of phloroglucinol component content determination.