Shepherd's purse contains shepherd's purse acid, is an effective hemostatic component, can shorten the bleeding and clotting time. Shepherd's purse contains acetylcholine, sterol and quaternary amine compounds, not only can reduce blood and liver cholesterol and triglyceride content, but also lower blood pressure. Shepherd's purse contains dengpi glucoside can be anti-inflammatory and antibacterial, has enhanced the body's vitamin C content, but also anti-virus, frostbite prevention, diabetic cataract patients also have therapeutic effects. Shepherd's purse contains dithiothiophenol sulfur ketone, has anti-cancer effect. Shepherd's purse is also rich in vitamin C, can prevent nitrate and nitrite in the digestive tract into carcinogenic substances nitrosamines, can prevent stomach cancer and esophageal cancer. Shepherd's purse contains a large amount of crude fiber, after eating can enhance intestinal peristalsis, promote excretion, thereby enhancing metabolism, help prevent and control hypertension, coronary heart disease, obesity, diabetes, intestinal cancer and hemorrhoids. Shepherd's purse is rich in carotene, because carotene is vitamin A original, so it is the treatment of dry eye disease, night blindness good food.