Astragalus (scientific name: Astragalus propinquus schischkin) is a plant of Astragalus in Leguminosae. Herbs perennial, 50-100 cm tall. The main root is thick, woody, often branched, gray white. Astragalus root can be used as medicine, with sweet taste and mild temperature. It has the functions of Invigorating Qi and strengthening surface, diuresis, strengthening heart, reducing blood pressure, anti bacteria, supporting toxin, discharging pus, generating muscle, strengthening capillary resistance, antiperspiration and sex hormone like effects. It can treat exterior deficiency and self perspiration, internal injury due to Qi deficiency, spleen deficiency and diarrhea, swelling and carbuncle. Pharmacological research shows that Astragalus root contains choline, coumarin, folic acid, amino acid, betaine, soap, etc Glycosides, sugars, proteins, riboflavins, flavanes, iron, calcium, phosphorus, selenium, zinc, copper, manganese and other trace elements. It has the functions of Invigorating Qi and strengthening the surface, diuresis, strengthening the heart, reducing blood pressure, anti bacteria, supporting toxin, discharging pus, generating muscle, strengthening the resistance of capillaries, stopping perspiration and sex hormone like. It can cure the deficiency of the surface, self perspiration, internal injury due to Qi deficiency, diarrhea due to spleen deficiency, edema, carbuncle and gangrene, etc. Astragalus membranaceus can prevent the decrease of liver sugar, protect the liver, promote the increase of white blood cells in human blood, resist the decrease of white blood cells caused by chemicals, radiation or other reasons, and significantly improve the phagocytic function of monocyte macrophage system and white blood cells. However, Astragalus is still the most important tonic Qi, water and swelling, the most suitable for puffiness.