Plateau pulmonary edema is a relatively serious kind of plateau reaction, which requires timely consultation and active treatment. Plateau pulmonary edema is mainly manifested from the plain to high altitude of more than 3km above sea level. Generally, it refers to altitude of more than 3000m above sea level, and plateau pulmonary edema can also occur below 3000m above sea level. In addition, sometimes patients with plateau pulmonary edema may also develop lung infection, which may even cause shock and heart failure. Therefore, it is necessary to administer oxygen promptly after the appearance of plateau pulmonary edema, sedate if necessary, improve cardiac function and reduce the burden on the heart, and most patients can be cured after active treatment. Because the main problem of the disease is plateau hypoxia, that is, low partial pressure of oxygen, generally 10mmHg lower than the plain oxygen partial pressure, the amount of oxygen is relatively thin, which can lead to plateau reaction causing pulmonary edema. So leaving the plateau environment is the most effective treatment.