High-efficiency and low-pollution method for extracting sea cucumber polysaccharide from sea cucumber cooking liquor

The invention belongs to the field of sea cucumber fine processing and marine biological resource development, and particularly relates to a high-efficiency low-pollution method for extracting sea cucumber polysaccharide from sea cucumber cooking liquor, which comprises the following steps of: centrifuging the sea cucumber cooking liquor at a high speed to remove impurities such as large-particle silt, adding soluble starch to flocculate and settle silt particles which cannot be removed; protein and polysaccharide molecules are separated through an enzymolysis and salting-out method and ultrafiltration concentration, and finally, sea cucumber active polysaccharide powder is obtained through spray drying. By adopting the method, obstacles caused by a large amount of silt contained in the sea cucumber cooking liquor to preparation of the sea cucumber polysaccharide can be greatly reduced, operation is simple, reagents used in the extraction process are free of organic reagents, low in cost and easy to obtain, t