Patients with emphysema who are accompanied by hypoxemia can be treated with home oxygen therapy, which is clinically advocated to be continuous low-flow oxygen, with its oxygen concentration controlled within 30%. Emphysema is often accompanied by different degrees of lung function impairment. When patients with emphysema develop hypoxemia, home oxygen therapy is recommended. Since emphysema can cause a decrease in ventilation function, which can easily lead to carbon dioxide retention, and can seriously lead to type II respiratory failure, it is generally recommended that low-flow oxygen be administered, with the oxygen flow rate maintained at 1-2L/min and the oxygen concentration of the oxygen absorbed at 30% or less. Home oxygen therapy is recommended for patients with emphysema to maintain oxygen intake for more than 15 hours under the guidance of a doctor, so that patients can improve their quality of life, comfort and reduce the chances of hospitalization through continuous oxygen intake. Therefore, patients can have their own oxygen concentrator at home to facilitate oxygen intake at any time. If the diagnosis of emphysema is made, it is recommended to consult a doctor in a timely manner and standardize the treatment under the doctor’s guidance to avoid delaying the condition.