Nucleic acid extraction and purification device

The utility model discloses a nucleic acid extraction and purification device, and relates to the technical field of nucleic acid extraction, in particular to a nucleic acid extraction and purification device which comprises a base, a mixing box is arranged on the upper surface of the base, a first through hole is formed in the upper surface of the mixing box, and a first bearing is arranged in the first through hole; according to the nucleic acid extraction and purification device, through cooperative arrangement of the first motor, the first gear, the second gear, the first shaft rod, the second shaft rod and a stirring rod, in the using process, corresponding materials and liquid are added into the mixing box, then through rotation of the first motor, the stirring rod is rotated, and the stirring rod is rotated to stir the materials and the liquid; the first shaft rod and the first gear are driven to rotate, then the second gear is driven to rotate, the second shaft rod rotates, the two stirring rods rotat