Chronic pulmonary embolism can be treated with medication, such as anticoagulant drugs, thrombolytic drugs, and surgery if necessary. 1. Anticoagulant drugs: anticoagulant drugs such as warfarin and low molecular heparin can promote the dissolution of thrombus and prevent the re-formation of thrombus, inhibit the secretion of nerves and body fluids caused by thrombus, and thus stop the development of the disease. 2. Thrombolytic drugs: the main purpose of thrombolytic drugs is to remove pulmonary embolism, and urokinase can be chosen to improve the function of deep vein valves and the diffusion ability of pulmonary capillaries. 3. Surgery: If the chronic pulmonary embolism is more serious, pulmonary embolization can be chosen as the treatment to improve the symptoms through surgery. Chronic pulmonary embolism, patients should go to the hospital in a timely manner, under the guidance of the doctor to take treatment, the above drugs should be used under the guidance of the doctor, can not be used indiscriminately, so as not to lead to adverse consequences.