There are many varieties of drugs used clinically for cough and expectoration in children, and the selection of cough and expectorant drugs should be based on etiologic treatment. Clinical treatment for children is based on phlegm and expectoration, supplemented by cough, and actively addressed from the etiology. If children have a pronounced and violent cough accompanied by a lot of sputum, they can take oral bromhexine, pulmonary cough oral solution, and amiloride under the guidance of a doctor as appropriate. In addition to oral medication, children can also be treated by nebulization, such as nebulized tranylcypromine and nebulized acetylcysteine. Nebulization has fewer side effects for children and can be considered for children who do not like to take medicine. Children who do not like to take medicine can consider nebulizer treatment. If children are more ill and cannot take medicine normally, they can also choose injection treatment. In addition to western medicine, some Chinese medicines also have the effect of relieving cough and resolving phlegm, such as lung-heat cough and asthma oral liquid, pulmonary cough and cough syrup. During the treatment process, children can be given more foods that are good for relieving cough and resolving phlegm, such as pears and radishes, and also drink more warm water.