Biological sample extraction device

The utility model relates to the field of biological equipment manufacturing engineering and discloses a biological sample extraction device which comprises a nucleic acid storage area, a mobile phase storage area, a chromatographic column, a temperature control component, a DNA collection area and an RNA collection area, wherein the nucleic acid storage area and the mobile phase storage area are connected with the inlet of the chromatographic column; the outlet of the chromatographic column is connected with the DNA collection area through a switch I and connected with the RNA collection area through a switch II; and the chromatographic column is wrapped by the temperature control component. According to the scheme of the utility model, the manual operation involvement degree is reduced, the automatic operation degree is high and convenience is brought to the large-scale separation of nucleic acid substances.