NOVELTY - Extracting schisandra propinqua acid A, involves: (1) cutting raw material schisandra propinqua, adding in high speed tissue triturator; (2) mixing raw materials, adding aqueous ethanol solution, and then adding water, ultrasonicating, to obtain enzymolysis raw material; (3) pumping enzymolysis raw material into extraction kettle for supercritical fluid extraction into the CO2, and collecting extract; (4) purifying extract by high pressure silica gel column chromatography purification method, collecting schisandra propinqua acid A fraction; and (5) re-crystallizing thick crystal.    USE - For extracting schisandra propinqua acid A (claimed).    ADVANTAGE - The method is simple in operation, is suitable for mass production; has low energy consumption, small pollution, short production period; and is environment-friendly. The method is featured with simple operation, short time consumption, high yield, easy mass production, use high pressure chromatographic column, sampling amount is large, the production period is short, the degree of separation is good and the purity of the product is high.    DETAILED DESCRIPTION - Extracting schisandra propinqua acid A, involves: (1) cutting raw material schisandra propinqua, adding in a high speed tissue triturator, then keeping for 5 minutes at the rotating speed of 18000 revolution per minute (rpm) under suitable condition, passing 60 items sieve; (2) mixing the raw materials according to ratio of material to liquid of 1:12-18 (g/ml), adding ethanol aqueous solution, and then adding water, Cellulase is 5%, the ultrasonicating at power of 500 W, at 4 degrees C for 15-20 minutes, to obtain the enzymolysis raw material; (3) pumping the enzymolysis raw material into extraction kettle for supercritical fluid extraction into the CO2, where the extracting pressure is 28-45 MPa, temperature is 35-55 degrees C, and the time is 3 hours, and analyzing pressure is 6-8 MPa, the analyzing temperature is 28-36 degrees C, and collecting the extract; (4) purifying the extract by methanol, by high pressure silica gel column chromatography purification method, eluting methylene dichloride-methanol solvent, collecting schisandra propinqua acid A fraction, decompressing and concentrating, cooling and crystallizing to obtain coarse; and (5) re-crystallizing the thick crystal to obtain schisandra propinqua acid A with methanol.