Under normal circumstances, the liver regeneration ability is very strong and can still regenerate after partial resection, but in patients with liver disease, the regeneration ability of the liver will be affected. Some clinical trials have shown that even if 2/3 of the normal liver is removed, its normal physiological function can be maintained and it can return to its preoperative liver weight in about 6~8 weeks. However, the regeneration rate of liver varies from person to person due to individual differences, living environment, medical conditions and other factors. For patients who have liver disease themselves, such as chronic hepatitis or cirrhosis, the regeneration ability and repair speed of the liver will be significantly reduced, and in severe cases, liver failure can occur and the liver cannot regenerate, so these patients need to keep a larger liver residue. Due to the strong regenerative ability of the liver, hepatectomy is now more widely used in the clinic. Before performing the surgery, the patient’s systemic symptoms and the reserve capacity of the liver should be understood, the feasibility of surgical eradication of the lesion should be assessed and a plan should be drawn up, and the compensatory recovery of the residual liver should be closely monitored after the surgery.