The liver function test mainly refers to blood sampling. The liver function test mainly includes glutamic oxalyl aminotransferase, glutamic alanine aminotransferase, alkaline phosphatase, glutamyl transpeptidase, total bilirubin, direct bilirubin, indirect bilirubin, total protein globulin, albumin and so on. Basically, they can reflect the synthesis, metabolism and secretion functions of the liver, and if these functions are damaged, it can be reflected by the liver function test. You should not eat or drink after 10:00 p.m. the day before the liver function test, because eating in the morning may affect the liver function test index. Do not drink alcohol or exercise strenuously the night before the test, and ensure good rest and sufficient sleep to best reflect the state of liver function.