The invention provides a DNA extraction and identification technology about Fujian strobilanthes cusia, which can promote the further research of the technology in the aspect of molecular biology of the Fujian strobilanthes cusia and solve the problem that the prior art has no DNA extraction and identification technology about the Fujian strobilanthes cusia. The DNA extraction and identification method of the strobilanthes cusia comprises the steps of DNA extraction, primer screening, PCR amplification system, determination and analysis. The adoption of the technology is characterized by applying an organic solvent-chloroform to completely extract the pigment part, thereby eliminating the interferences of pigments and other substances and improving the purity of extracted DNA; and a set of characteristic primers and an amplification system which are applicable to DNA amplification of the Fujian strobilanthes cusia are screened out through experiments. The results produced by applying the technology system to amplify a plurality of Fujian strobilanthes cusia population samples show that the extracted DNA has rich diversity, clear amplified bands, significant difference and obvious genetic relationship among populations. Simultaneously, the technology is also applicable to DNA extraction and identification of other plants which are rich in the pigments.