Patients with pulmonary heart disease can be divided into pulmonary heart function compensated stage and pulmonary heart function decompensated stage according to the progression of the disease. For the pulmonary heart function compensated stage, the 5-year survival rate is high; for the pulmonary heart function decompensated stage the 5-year survival rate is about 50%. For the pulmonary cardiac decompensation stage, this stage is dominated by respiratory failure, and in severe cases, right heart failure. For patients with respiratory failure, pulmonary encephalopathy is a common cause of death from pulmonary heart disease. Patients with progressive course of pulmonary heart disease should be seen early to control the disease and require long-term drug therapy and follow-up. When acute exacerbation occurs due to infection, patients should be seen promptly and given ventilator-assisted ventilation, anti-infection, expectoration, wheezing, hormones, and anti-heart failure therapy in order to improve their poor prognosis to a greater extent.