The five liver function tests mainly include total protein, albumin, alanine aminotransferase, aspartate aminotransferase and bilirubin. 1. Aminotransferase: mainly includes alanine aminotransferase and aspartate aminotransferase, which reflects the degree of damage to liver cells. However, the degree of elevation is not absolutely proportional to the degree of damage to the hepatocytes. When there is severe liver function impairment and bile enzymes are separated, the transaminases will not be elevated significantly. 2. Bilirubin: it can reflect the function of liver detoxification, excretion and secretion, including direct bilirubin, indirect bilirubin, total bilirubin, etc. Elevation of the index generally indicates abnormal liver function or hemolysis. 3. Total protein and albumin: they are mainly synthesized by the liver, and a low indicator suggests that the liver’s ability to synthesize protein is significantly reduced. If abnormal liver function is found in the examination, you should go to the hospital in time to avoid adverse consequences.