Abstract: Bariatric surgery has been proven to be an effective way to relieve obesity and related metabolic diseases. Complications after bariatric surgery mainly include postoperative bleeding, anastomotic leakage, gastroesophageal reflux, dumping syndrome and so on. Deep vein thrombosis is a rare complication, with low incidence in many literatures. However, deep vein thrombosis is an important cause of pulmonary embolism. Once pulmonary embolism occurs, the difficulty of treatment and mortality are both high. The authors summarize the related literature on venous thromboembolism after bariatric surgery, and briefly describe the strategies of prevention and treatment of venous thromboembolism.