The invention provides an infant cough-relieving and phlegm-reducing medicine which is prepared from the following traditional Chinese medicine raw materials of fermented soybean, cicada slough, schizonepeta, mint, unibract fritillary bulb, peucedanum praeruptorum, platycodon grandiflorum, folium mori, sterculia lychnophora, fructus aristolochiae, pinellia ternata, succus bambusae, semen lepidii, radix stemonae, tatarian aster root, lilium brownii, white mulberry root bark, honeysuckle, liquorice, radix scutellariae, corn stigma, almond, polygonatum and polished round-grained rice, and is added with white radish, red dates, fresh pears and fresh lotus root. The medicine is formed by repeatedly testing and dosing through clinic tests, is in accordance with the theory of the traditional Chinese medicine, and has the functions of relieving cough, reducing phlegm, moistening lung, relieving asthma, promoting the secretion of saliva or body fluid, tonifying qi, regulating metal activities, lowering fire, clearing heat, removing toxicity, protecting throat and relieving sore throat. The infant cough-relieving oral liquid has unique curative effects on treating cough due to common cold, thick phlegm, asthma and throat dry itching, and basically relieves the pain of infant patients. Compared with the prior art, the infant does not need to orally take antibiotics, the medicine has stronger pertinence, is low in cost, has good taste, is easy to absorb, and has a quick curative effect.