Positive alpha-fetoprotein refers to a test result that is above the reference value when an alpha-fetoprotein test is performed. 1. Alpha-fetoprotein is a kind of glycoprotein, which is mainly stored in liver cells during embryonic period, and will disappear from the blood after the fetus is born. When liver cells become cancerous, the function of producing this protein will be restored, and the level of alpha-fetoprotein in the blood will increase rapidly as the disease worsens. 2. The normal value of alpha-fetoprotein should be below 20ng/ml. If it exceeds the normal value, it may be caused by liver function damage, liver cancer, malignant tumor of digestive system, malignant tumor of reproductive system and so on. When checking out the positive alpha-fetoprotein, you need to further check the quantitative alpha-fetoprotein to clarify the specific content, and also need to carry out liver ultrasound, CT and other projects to clarify the cause of the disease, and then follow the doctor’s instructions to carry out targeted treatment.