Cholinesterase is an important liver function test that reflects whether the liver is damaged. The normal value of cholinesterase is usually 5410-32000 U/L for men and women over 40 years old, and about 4300-11500 U/L for women under 40 years old. clinically, increased cholinesterase is mostly seen in patients with certain neurological diseases, hyperthyroidism, diabetes mellitus, hypertension, etc. decreased cholinesterase is common in organophosphorus poisoning, hepatitis, cirrhosis, malnutrition, pernicious anemia, acute infection, myocardial infarction, pulmonary infarction, chronic nephritis and late pregnancy, Pernicious anemia, acute infections, myocardial infarction, pulmonary infarction, chronic nephritis, and late stages of pregnancy.