Antitrypsin refers to serum α1-antitrypsin in clinical practice, and elevation indicates inflammation, malignancy, and so on. Serum α1-antitrypsin is mainly synthesized by the liver, and the normal value of serum α1-antitrypsin in normal adults is 0.9~2g/L. Serum α1-antitrypsin is an acute time-phase reactive protein, and elevation often suggests inflammation or infection, and can also suggest malignant tumors, such as cervical cancer and Hodgkin’s disease, etc. It can also be elevated in other diseases or physiological conditions, such as systemic lupus erythematosus, recovery from burns, pregnancy, estrogen therapy, etc. If serum α1-antitrypsin is elevated, it is recommended to check the cause of the elevation and follow the doctor’s instructions to standardize the treatment, so as not to delay the condition.