As an important part of general surgery, the Department of Liver Surgery is mainly engaged in the diagnosis and treatment of benign and malignant tumors of the liver, as well as liver transplantation for patients with end-stage liver disease. We are specialized in treating all kinds of liver-occupying diseases, with an annual intake of more than 1,500 patients and a monthly surgical volume of about 200 operations. As a specialty integrating medical education and research, we have reached the domestic advanced level in the diagnosis and treatment of various complex liver-occupying diseases and related research. The Department of Liver Surgery is advancing steadily with exquisite technology, excellent service, serious teaching and rigorous research. 1.Diagnosis and treatment of benign and malignant tumors of liver. Our diagnosis and treatment level is in line with the international standard, and we have been widely recognized by our peers in the industry for our unique insights and treatments for many complex liver diseases. Liver surgery is evaluated using a combination of liver function evaluation, liver reserve testing and diagnostic imaging. Virtual hepatectomy is performed through three-dimensional reconstruction to formulate a surgical plan. By combining the theory of precise hepatic resection with clinical practice, the incidence of incidental injuries has been greatly reduced, and the surgical results have been significantly improved. In addition to conventional precise hepatic lobectomy and segmental hepatectomy, we have also performed a number of complex hepatic surgeries, including hepatic square lobectomy, mesohepatic resection, and hepatic giant hemangioma resection. In addition, in recent years, through skillful and delicate liver surgery techniques, we have performed several cases of portal vein and vena cava removal of cancerous embolus, expanding the indications for surgery of liver malignant tumors, and enabling more patients with advanced hepatocellular carcinoma to have access to surgical treatment. （Minimally invasive treatment of benign and malignant tumors of liver The treatment of liver tumors is still mainly based on surgical resection, but most of the patients with tumors in China have been found to be in the middle and late stages with significant cirrhosis, and these patients can not afford hepatic resection. In addition, there are some patients with small tumors in special locations, and the damage and risk of surgical resection are obviously high. For these two cases, our department takes the lead at home and abroad to carry out laparoscopic hepatectomy, dual chemotherapy of hepatic artery and portal vein, and minimally invasive treatment such as microwave and radiofrequency to treat benign and malignant tumors of the liver, and has achieved satisfactory clinical results; and also carries out the international advanced treatment means such as biotherapy, immunotherapy and molecular targeting therapy for the tumors at the same time, which has greatly prolonged the survival time of the patients and improved their quality of life greatly. The quality of life of patients has been greatly improved.