It is mainly used for serious infections caused by Gram-negative bacteria such as Escherichia coli, Klebsiella, Proteus, Pneumonia, Enterobacter aerogenes and Shigella, and also has good resistance to drug-resistant Staphylococcus aureus. Antibacterial effect. Clinically, it is mainly used for pulmonary infection, urinary tract infection, biliary tract infection, sepsis and abdominal infection caused by sensitive bacteria. The latter two are often used in combination with other antibacterial drugs. It can also be used for Staphylococcus aureus infections that are resistant to other antibiotics and are sensitive to this product. For the treatment of tuberculosis, this product can be used as a second-line drug.