The treatment of pulmonary thromboembolism is as follows: 1.Conventional treatment: firstly, the patient is instructed to rest in bed and keep the bowels open; 2.Symptomatic treatment: to stop cough and dissolve sputum, if the hemodynamic is unstable, hemodynamic treatment should be maintained; 3.Respiratory support: for patients with hypoxia, according to the degree of hypoxia, nasal catheter oxygenation, mask oxygenation, non-invasive ventilation and other ways of treatment can be chosen, and even in severe cases, invasive respiratory support should be intubated; 4.Thrombolytic treatment: generally used for patients with hemodynamic instability or low blood pressure, which should be performed within 14 days after the condition is controlled. Intubation for invasive respiratory support; 4. Thrombolytic therapy: generally used for patients with hemodynamic instability or low blood pressure, who need to be hospitalized and determined to be free of contraindications to bleeding, within 14 days, and then changed to anticoagulation therapy after the condition is controlled. Thrombolytic drugs include urokinase, streptokinase, recombinant tissue-type fibrinogen activator; 5. Anticoagulation therapy: for non-severe pulmonary artery thromboembolism, anticoagulation therapy can be given, i.e., combined with low-molecular heparin sodium and warfarin for 4-5 days at the same time, after which the treatment is changed to oral warfarin for 3-6 months, with dynamic monitoring of its clotting time during the treatment period.