The classification of chronic hepatitis B as mild, moderate or severe is an old method that is no longer used in clinical practice. Previously, patients were classified according to their liver function levels of bilirubin and transaminases, but for moderate, it was between mild and severe, and generally speaking, the disease was not very serious. The assessment of moderate is only an indication of the current state of hepatitis activity, which is not constant and can be changed through treatment. However, if the treatment is inappropriate, the virus replicates repeatedly and the inflammatory activity increases, there is a risk of progression to severe or even to chronic liver failure. Therefore, even in moderate or severe hepatitis, as long as the correct measures are taken with timely treatment, most of the disease can be controlled and can be improved.