Oxygen intake in heart failure patients is beneficial. Oxygen inhalation is a means of treating heart failure. By inhaling oxygen, the blood oxygen saturation of heart failure patients can be increased, and low partial pressure of oxygen and carbon dioxide retention can be improved. Heart failure will appear shortness of breath, chest tightness, breath-holding, dyspnea and other symptoms, for acute heart failure, need to timely oxygenation, relieve dyspnea, hypoxia and other symptoms. Patients with heart failure can take oxygen in daily life, but oxygen tools and oxygen concentration need to be used and set under the guidance of professional doctors. For patients with severe heart failure, oxygen inhalation alone is not enough and often requires a ventilator to assist ventilation. Oxygen intake for heart failure patients needs to be carried out under the guidance of a doctor. Any discomfort during treatment is recommended to consult a doctor.