Neoagarodecaoses are used in the development of new products in the fields of medicine, food, aquaculture, modern agriculture, daily chemical industry and biochemical reagents; as reference standards for the testing, analysis and quality control of oligosaccharides; for the preparation and research of oligosaccharide chips; for the study of the interaction between oligosaccharides and proteins; and for the study of the structure-activity relationship and mechanism of action of oligosaccharide drugs, etc., in the fields of glycochemistry and glycobiology.