Asparagus can be decocted in soup, boiled in paste, or taken in pills or powder. Asparagus is the tuberous root of asparagus in the lily family. It is sweet, bitter and cold in nature; it belongs to the lung and kidney meridians. It has the effect of nourishing yin and moistening dryness (nourishing yin essence and clearing away heat), clearing the lung and lowering fire. It can be used for treating cough with dryness and heat, cough due to deficiency of yin and labor, injury of yin in heat diseases, internal heat and thirst (internal heat accompanied by eating, drinking and urinating), intestinal dryness and constipation, sore throat and swelling of the throat. Clinical asparagus is often used with other drugs to enhance the efficacy, such as with maitake can enhance the role of nourishing yin and moistening the lung. Apply to lung and kidney yin deficiency, cough, hemoptysis, etc.; with the mother of pearl can enhance nourishing yin and moistening the lung, clearing phlegm heat effect. It is suitable for phlegm-heat congestion of the lungs, injury to the fluid, phlegm viscous and difficult to cluck. Because of the cold nature of asparagus, it is forbidden to take it for people with deficiency cold diarrhea and wind-cold cough. The drug needs to be used under the guidance of a doctor, not blindly.