There are many causes of cough with phlegm and vomiting in children, which may be caused by acute upper respiratory tract infection, bronchitis, pneumonia, etc., and appropriate treatment should be chosen according to the actual cause of the disease. 1. Acute upper respiratory tract infection: As children’s resistance is relatively weak, they are easily attacked by disease-causing microorganisms, resulting in acute upper respiratory tract infections, which are usually accompanied by inflammation of the throat and nasal cavity, and children will show coughing, phlegm, and vomiting, and can be treated with medications such as pediatric cold and flu granules under the advice and guidance of a doctor. Parents should encourage children to drink more water and rest. 2. Bronchitis: bronchitis is usually caused by viral infections, most often in the change of season, will cause children to cough, cough serious, will cause increased abdominal pressure, irritation of the respiratory mucosa and gastrointestinal mucosa, phlegm, vomiting and other symptoms, the general supportive treatment, coughing under the guidance of the doctor to use pediatric phlegm cough granules and other drugs. 3. Pneumonia: pediatric pneumonia can be manifested as cough, sputum, dyspnea, serious, resulting in diaphragmatic spasm, can cause gastroesophageal reflux, vomiting, can be selected for the pathogen sensitive antibiotic treatment, such as bacterial infections with amoxicillin, etc.; viral infections with antiviral drugs such as ribavirin. If a child has a cough with phlegm accompanied by vomiting, it is necessary to go to the hospital in time for examination and symptomatic treatment. All of the above drugs should be used under the guidance of a doctor.