Oxygen inhalation in heart failure is beneficial. When heart failure, the patient’s pulmonary circulation is stagnant, resulting in the ventilation function is affected, the oxygen content in the blood is reduced, chest tightness and shortness of breath symptoms occur, oxygen inhalation can appropriately increase the oxygen content of the blood, increase the supply of oxygen to the organs and tissues, help to improve the symptoms. When heart failure is severe, a large amount of pleural effusion may occur, and the ventilation function of the lung tissue is seriously affected, and even combined with respiratory failure when the lack of oxygen is severe, the drug treatment of heart failure at the same time, assisted by oxygen inhalation, can help to improve the blood oxygen content, relieve the condition, if the simple nasal catheter oxygen inhalation can not improve the patient’s symptoms, and even the need for non-invasive respiratory assisted treatment. Oxygen is an auxiliary treatment for heart failure, heart failure oxygen is beneficial, heart failure patients need regular cardiology clinic review, changes in condition should be timely consultation, formal hospitalization.