The change of transaminase value mainly reflects the function of the liver, when the transaminase is elevated, it usually indicates that the liver is damaged. The normal value of transaminase is 0-40U/L, which is the catalyst that must be indispensable for the normal operation of the human body’s liver as a chemical factory, and it is the barometer of the liver. Hepatocytes are the main living place of transaminase, and inflammation, poisoning and necrosis of hepatocytes will cause damage to hepatocytes, and transaminase will be released into the bloodstream, which will increase the serum transaminase. Transaminase is a very sensitive indicator, when 1% of liver cells are damaged, transaminase will be doubled, so transaminase is very sensitive to determine whether the liver is damaged, when determining liver damage, need transaminase combined with bilirubin, albumin and other indicators for comprehensive analysis.