The liver is the largest digestive gland in the body and has four major functions: synthesis, secretion, detoxification, and immunity. The functional indicators of the liver are as follows: 1, reflecting the synthetic function of the liver: albumin, globulin, and the ratio of white spheres; 2, coagulation function: most of the coagulation factors are synthesized in the liver, so when the liver damage is more serious, abnormal coagulation function will occur; 3, total bilirubin, indirect bilirubin and direct bilirubin, reflecting the metabolic capacity of liver bile pigments, in the case of hepatocyte damage or biliary obstruction, with hemolysis When there is hemolysis, the indexes will be abnormal; 4. Indicators of liver parenchymal cell damage: enzymatic indicators, such as glutamic aminotransferase, glutamic oxalacetic aminotransferase, alkaline phosphatase, and gamma-GT, mainly reflect the damage of liver parenchymal cells. The clinical diagnosis of the disease is based on these laboratory indicators, combined with the medical history and other relevant imaging indicators.