The kit utilizes the magnetic bead that could specifically bind to nucleic acid, and the unique buffer system. It is applicable to the nucleic acid extraction, enrichment, and purification of cervical exfoliated cells, urine specimens, and cultured cells. The purified nucleic acid could be applied to the Real-time PCR, RT-PCR, PCR, sequencing and other tests. The operators should have professional training in molecular biological detection and be qualified for relevant experimental operations. The laboratory should have reasonable biological safety precautions and protective procedures.