Glutamyl transpeptidase is one of liver function, widely distributed in human tissues, the most in kidney, followed by pancreas and liver, and the most in liver in embryonic stage, the glutamyl transpeptidase in normal human serum mainly comes from liver. The normal reference value of glutamyl transpeptidase is 3-50U/L. If only this index is 62U/L and all other indexes are normal, it means that the problem is not very big and is mostly considered to be mildly high. The clinical causes of this indicator are physiological and pathological. Physiological is mainly caused by severe fatigue and frequent late nights; pathological is mainly seen in alcoholism, drugs, liver diseases, including viral hepatitis, fatty liver, cirrhosis, primary liver cancer and other liver diseases. Therefore, specific analysis of this index also needs to be combined with transaminases, bilirubin, alkaline phosphatase, ultrasound and other related examinations to clarify the etiology. After patients have mildly high glutamyl transpeptidase, they should improve their lifestyle, quit smoking and alcohol, eat less greasy, fried, high-fat and high-sugar foods, maintain balanced nutrition, and exercise properly. Besides, it is recommended to go to the hospital for relevant examination to confirm the cause of abnormal liver function and give symptomatic treatment to avoid delaying the disease and causing serious consequences.