The vast majority of chronic pulmonary embolisms do not require surgical treatment. Only about 2% of chronic pulmonary embolisms that develop into chronic embolic pulmonary hypertension require surgical treatment. 1. Most of the chronic pulmonary embolism can be treated and prevented by oral anticoagulants and vasodilators, as well as cardiotonic, diuretic, oxygenation and other internal medicine means to control the condition of pulmonary embolism and do not require surgery. 2. About two percent of chronic pulmonary embolism can develop into chronic embolic pulmonary hypertension, which is ineffective in internal medicine, and if it reaches the surgical standard, pulmonary artery thrombectomy or lung transplantation can be performed. Whether chronic pulmonary embolism should be operated, it is recommended to go to the regular hospital for further consultation.