Astragaloside IV is the most important component of astragalosides. It has the effects of enhancing immunity,strengthening heart, lowering blood pressure, lowering blood sugar, diuresis, anti-aging, anti-fatigue and so on.The astragaloside IV is produced by environment-friendly process with high purity ( > 99%) and the only organic reagent involved is ethanol. Solvent residues and heavy metals meet the requirements of ICH for pharmaceutical raw materials. It can be safely used in medicine and health food.