The invention discloses a compound oral solution for treating infantile cough, which is prepared from the following raw materials in parts by weight through active ingredient extraction, purification and formation: 21 parts of ginseng, 19.5 parts of tuckahoe, 9 parts of bighead atractylodes rhizome, 18.5 parts of dried orange peel, 19 parts of gizzard pepsin, 11.5 parts of rhubarb roasted with wine, 18.5 parts of turtle shell, 22 parts of wolfberry bark, 38 parts of radix glehniae, 11.5 parts of roasted licorice, 28 parts of sweet wormwood, 38 parts of ophiopogon root, 9 parts of cassia twig, 9 parts of dried ginger, 7 parts of prepared monkshood, 28 parts of snakegourd fruit, 19 parts of coltsfoot flower, 21 parts of aster, 24 parts of mulberry bark, 7 parts of arisaema cum bile, 21 parts of milk vetch and 19 parts of medlar. The active ingredients in the compound oral solution disclosed by the invention disperse in the medium in a molecular or granular state, thus the compound oral solution has the advantages of large dispersion degree and high absorption rate and quickly exerts the treatment effect; and simultaneously, the compound oral solution is easy to realize the divided dose, is convenient to take, reduces the irritation of medicines, has better taste and is especially suitable for old people and children. The compound oral solution disclosed by the invention has the advantages of stable property, high clarity, long shelf life (2 years) and high bioavailability, and has good treatment effect and no toxic side effect when used for treating infantile cough.