Thromboembolic disease is one of the most common complications in patients with nephrotic syndrome. The most common site of thromboembolic formation is the renal vein, with an incidence of about 30%, and other conditions are not uncommon in pulmonary vascular embolism, lower limb veins, inferior vena cava, coronary vessels, and cerebrovascular embolism. The formation of thrombosis in patients with nephrotic syndrome is mainly related to the large amount of proteinuria, severe hypoproteinemia, resulting in blood concentration and increased blood viscosity due to hyperlipidemia, etc. The use of diuretics or glucocorticoids in patients will further aggravate the hypercoagulable state of the body and make it easier to form thrombosis. For patients with nephrotic syndrome, anticoagulation therapy should be given when plasma albumin is below 20 g/L in general.