The treatment of Pneumocystis carinii pneumonia mainly includes the following aspects: 1. General treatment: Patients should rest in bed, increase nutritional intake, pay attention to the intake of water and electrolytes, and be given nasal catheter oxygen or face mask oxygen, ventilator-assisted breathing to correct hypoxic performance. 2. side effects. If the patient’s lesions are diffusely altered and severe hypoxemia occurs, short-term use of glucocorticoids can reduce the inflammatory response, and gammaglobulin and thymidine can be given to enhance immune therapy.3. Treatment of underlying diseases: Pneumocystis carinii pneumonia patients generally have malignant tumors, hematologic diseases, HIV infection and other underlying diseases, and need to actively control the primary disease to reduce the continued decline in immune function.