The survival of a patient is not clear based on a single test, transaminase 300 U/L. In general, elevated transaminases have little impact on survival, and their elevation is usually not related to the severity of liver damage. The main liver function tests used are alanine aminotransferase (ALT) and aspartate aminotransferase (AST). The reference range for both is 5-40 U/L for ALT and 8-40 U/L for AST, respectively, and patients with hepatitis B can usually detect ALT > 300 U/L and AST > 200 U/L. Transaminases of 300 U/L are most often indicative of hepatitis virus infection, and they peak 1-2 weeks after infection and gradually decline from week 3 to week 5. Therefore, it is not clear how long you can live with transaminase 300U/L, but because it is higher than the normal reference range, it is recommended to go to the gastroenterology department of the hospital in time to improve the relevant tests and actively treat the patient after a clear diagnosis to prevent more serious consequences. In addition, it is necessary to eat vitamin-rich vegetables and fruits such as fungus, shiitake mushrooms, grapes, pears and other foods to promote the recovery of liver function when transaminases are high.