Bacterial liver abscess refers to a suppurative infection focus in the liver formed by suppurative bacteria invading the liver. The disease can be caused by biliary disease (accounting for 16% to 40%), portal vein blood infection (accounting for 8% to 24%), direct infection is less common, and reports of infection through the hepatic artery blood vary, with the highest being 45%, and occult infection accounting for about 10% to 15%. Gram-negative bacteria are the most common pathogens, of which 2/3 are Escherichia coli, followed by Streptococcus faecalis and Proteus; Gram-positive bacteria are most common with Staphylococcus aureus, and the infection is often mixed. The main clinical manifestations are chills, high fever, pain in the liver area, hepatomegaly and tenderness.