Pulmonary hypertension caused by interstitial pneumonia should first be treated actively to control the progression of interstitial pneumonia, and at the same time, comprehensive strategies should be adopted to reduce the symptoms of pulmonary hypertension. 1. If interstitial pneumonia is clearly present, antifibrotic drugs such as pirfenidone and nidanib can be used according to the condition, which can slow down the decline of lung function. In addition, lung function training should be carried out as much as possible, and long-term oxygen therapy should be practiced for patients with obvious hypoxemia. 2. For the pulmonary hypertension that has already appeared, when there is uncompensated right heart failure leading to fluid retention, elevated central venous pressure, hepatic stasis and peripheral edema, diuretics such as furosemide and spironolactone can be taken to improve the symptoms. Long-term home oxygen therapy should also be given. Therefore, when pulmonary arterial hypertension also need to go to the hospital in time for examination and treatment, so as not to delay the condition.