If the liver function abnormality is the result of nutritional deficiencies, bile duct obstruction, etc., breastfeeding is usually possible. However, if it is caused by viral hepatitis, breastfeeding is not allowed in some cases. Clinically, there are many reasons for abnormal liver function, therefore, to determine whether abnormal liver function can be breastfed or not, it is necessary to depend on the actual situation and cannot be generalized. If the abnormal liver function is the result of nutritional deficiencies, bile duct obstruction, chronic heart failure and other diseases, breastfeeding is usually allowed and will not adversely affect the baby. However, if the liver function abnormality is due to viral hepatitis, such as triple positive, triple negative, etc., breastfeeding is usually possible if mother-to-child blockade has been completed, but not if mother-to-child blockade has not been completed, mainly because the virus can be transmitted through mother-to-child transmission, which can lead to the virus entering the baby’s body. In addition, babies usually need to be vaccinated against hepatitis B and injected with immunoglobulin after birth, which can play a preventive role to a certain extent. To summarize, it is recommended that mothers with abnormal liver function should go to the hospital for a series of relevant tests to determine the cause and decide whether or not they can breastfeed.