This kit is a nucleic acid extraction kit based on magnetic bead separation and purification. Its main principle is to use the functional groups on the surface of functional bio - magnetic beads to enrich nucleic acids from the sample lysate onto the surface of the magnetic beads. Then, a magnetic separation device is used to separate the magnetic beads, thus enabling the rapid separation and purification of nucleic acids. During the extraction process, there is no need to use toxic phenol - chloroform extraction, nor time - consuming alcohol precipitation. This kit can be integrated with a magnetic rod method or pipetting method automatic nucleic acid extractor for high - throughput extraction experiments. It can also be manually operated using a magnetic separation rack.