Chronic obstructive pulmonary disease can cause pulmonary heart disease, and it is one of the most common causes of pulmonary heart disease. Pulmonary heart disease, also called pulmonary heart disease, is a clinical syndrome that occurs as a result of right heart insufficiency due to pulmonary hypertension from a variety of causes. Chronic obstructive pulmonary disease is a chronic inflammatory airway disease that can present with restricted and incompletely reversible respiratory airflow. Chronic hypoxia can cause small pulmonary artery spasm, resulting in a gradual increase in pulmonary vascular resistance and pulmonary artery pressure, which can lead to enlargement and hypertrophy of the right heart or right heart failure, leading to pulmonary heart disease. Therefore, when pulmonary heart disease occurs in chronic obstructive pulmonary disease, the condition is more serious, and comprehensive treatment should be given in time.