This kit adopts the improved SDS-alkali lysis method, combined with the advanced silica gel membrane adsorption technology, to achieve the purpose of rapid purification of plasmid DNA. It is suitable for extracting up to 20 μg of high-purity plasmid DNA from 1~4 mL of bacterial culture. The extracted plasmid DNA can be used for molecular biology experiments such as enzyme digestion, PCR, sequencing, bacterial transformation, in vitro transcription and translation, etc.