If a one-year-old baby has a cough and sputum, it is important to keep the room ventilated and disinfected, keep the room temperature appropriate, reduce passive smoking, and give rich nutritional support therapy. Appropriate fluid supplementation can also be given to help humidify the airway and facilitate the discharge of phlegm from the airway. If there are nasal scabs and nasal secretions, they should be removed in time to keep the airway unobstructed. If there is more sputum, take oral aminoglutethimide hydrochloride to promote the discharge of sputum. If sputum blocks the respiratory tract, go to hospital for aspiration treatment. Anti-infection treatment should also be carried out. If coughing is frequent and affects sleep, you need to go to the hospital to perfect blood routine, mycoplasma, chlamydia and chest X-ray examination, and choose appropriate antibacterial drugs according to the examination results, and if necessary, intravenous infusion treatment is needed. It is not recommended to take oral antibiotic treatment by yourself without perfecting blood routine.