Liver function test is mainly a blood test, through the method of various biochemical tests, to check the indicators related to the function and metabolism of the liver, which can generally reflect the basic condition of the liver. Liver function tests mainly include indicators such as alanine aminotransferase, alanine aminotransferase, glutamyl transpeptidase, alkaline phosphatase, total bilirubin, direct bilirubin, indirect bilirubin, total protein, globulin and albumin, etc. Among them, alanine aminotransferase and alanine aminotransferase are indicators reflecting the acute hepatocyte necrosis, which will be elevated when there is inflammation in the liver and the hepatocytes are undergoing necrosis. Glutamyl transpeptidase, alkaline phosphatase, total bilirubin, direct bilirubin and indirect bilirubin are indicators of jaundice, which are elevated when there is liver damage or obstruction of the bile ducts. Total protein, albumin and globulin reflect the function of liver synthesis, and when the synthesis function of the liver is impaired, these indicators will decrease.