Normally, a value of 10.4 μg/L of alpha-fetoprotein is normal. Alpha-fetoprotein belongs to glycoprotein, which is mainly synthesized by fetal stem cells and yolk sacs. Its concentration is high in fetal blood but gradually decreases after birth, and the level of alpha-fetoprotein in adult blood is very low. The reference value for normal human alpha-fetoprotein content is less than 25ug/L. Currently, alpha-fetoprotein is clinically used as a serum marker for primary liver cancer, which is of positive significance in the diagnosis of primary liver cancer as well as in the monitoring of its efficacy. Typically, increased alpha-fetoprotein levels are transient in benign liver disease, while malignant tumors are persistently elevated. Dynamic observation of the level of alpha-fetoprotein makes it possible to identify benign and malignant liver diseases. In case of abnormalities in the results of alpha-fetoprotein tests, it is recommended to consult a doctor to clarify the cause of the disease with the help of a doctor and to carry out targeted management or treatment.