The device is used for the extraction of material (solid or liquid)under high pressure and suitable temperature extraction. Changing conditions in the separation kettle, the dissolved substances will resolve in order to achieve the purpose of separation. Supercritical CO2 extraction equipment includes several parts: extraction kettle, separation kettle,commingle, CO2 high-pressure pump, entrainer pump, refrigeration system, heat exchange system, CO2 storage tank, CO2 level gauge,purification system, flow meter, temperature control system, safety protection system etc. The supercritical CO2 extraction is specially suitable for extraction of fat-soluble and heat sensitive substances with high boiling point.Take CO2 as the solvent to make extraction and purification upon a lot of products such as biological products, foodstuff and medicines.