The invention relates to the technical field of medicines, in particular to a
nepeta hemsleyana supercritical extract for inhibiting
angiotensin converting enzyme activity and a preparation method thereof, and the preparation method comprises the following steps: S1, weighing a
nepeta hemsleyana medicinal material, and crushing into
powder to obtain
nepeta hemsleyana medicinal material
powder; and S2, carrying out supercritical extraction on the nepeta hemsleyana medicinal material
powder. And S3, finishing extraction, and collecting a product from a
discharge port to obtain the nepeta hemsleyana supercritical extract. The method is simple and practical in process flow, low in
toxicity, environment-friendly, suitable for industrial production and wide in application prospect.