Type I respiratory failure is mainly hypoxic respiratory failure caused by pulmonary ventilation dysfunction, which can be seen in severe lung infection, interstitial lung disease, pulmonary fibrosis, acute pulmonary embolism, etc. The treatment of this disease mainly includes the following points: 1. Keep the patient’s airway open, remove respiratory secretions in a timely manner, and encourage the patient to cough up sputum. 2. actively administer oxygen, either by nasal cannula, or by mask if the effect is not good. 3. if the effect of nasal cannula or mask oxygen is not good, ventilator assisted breathing can be given. 4. while taking the above auxiliary treatment measures, actively search for the cause of type I respiratory failure. The cause of type I respiratory failure should be identified and treated.