Astragaloside IV is an organic substance with chemical formula of C41H68O14. It is a white crystalline powder. It is a drug extracted from Astragalus membranaceus. The main active components of Astragalus membranaceus are astragalus polysaccharides, Astragalus saponins and Astragalus isoflavones,Astragaloside IV was mainly used as the standard to evaluate the quality of Astragalus. Pharmacological studies show that Astragalus membranaceus has the effects of enhancing immune function, strengthening heart and reducing blood pressure, reducing blood glucose, diuresis, anti-aging and anti fatigue.