Blue thistle is an excellent herbaceous flower. It is suitable for flower border and has good ornamental value. It has certain significance for enriching the species of garden flowers and improving the level of landscaping. Blue Thistle contains many kinds of fatty acids, among which the pure seed contains more. α- Linolenic acid, stearic acid (SDA), γ- Linolenic acid, linoleic acid and octadecyl tetraenoic acid are good products for health care and beauty.