NOVELTY - Extracting and separating method of agapanthussaponin-A involves: crushing the bulbs of Chionodoxa luciliae, adding into supercritical extraction kettle for supercritical carbon dioxide extraction, discharging the raw material slag followed by adding 50-80% ethanol solution, and carried out microwave extraction; adding active carbon to obtain decoloring solution; passing the decoloring solution through ultra-filtration membrane system and nano-filtration membrane to obtain product which further dried to obtain crude product; and then separating and purifying the crude product.    USE - For extracting and separating method of agapanthussaponin-A (claimed).    ADVANTAGE - The present method avoids large amount of sample loss; provides short production period and high efficiency; provides little pollution; and is suitable for industrial production.    DETAILED DESCRIPTION - Extracting and separating method of agapanthussaponin-A involves: taking the the bulbs of Chionodoxa luciliae, crushing it, adding into supercritical extraction kettle for supercritical CO2 extraction, removing the grease material, discharging the raw material slag; adding the obtained raw material residue with 50-80% ethanol solution, and carried out microwave extraction for 1-3 times, filtering the decoction to obtain the extracting solution; adding 2-4 wt./vol.% extracting solution in the active carbon, conducting heat preservation at 50-70 degrees C for 20-40 minutes, and filtering to obtain the decoloring solution; passing the obtained decoloring solution through ultra-filtration membrane system and nano-filtration membrane to obtain product which further dried to obtain crude product; separating and purifying the product by using the high speed counter-current chromatography, where the chromatography is used two-phase solvent system of petroleum ether-bi-acid bi-ester-ethanol-water (6-7:2-5:5-7: 4-7); collecting the content of sagapanthussaponin-A; and then concentrating and drying to obtain agapanthussaponin-A.