This product is used to treat serious infections caused by sensitive gram-negative bacteria such as Escherichia coli, Klebsiella, Enterobacter, Proteus, Serrella, Pseudomonas aeruginosa and methicillin-sensitive strains of Staphylococcus, such as sepsis, lower respiratory tract infection, intestinal infection, pelvic infection, abdominal infection, skin soft tissue infection, complex urinary tract infection, etc. The treatment of abdominal infection and pelvic infection should be combined with anti-anaerobic drugs, clinical use of gentamicin and other antibacterial drugs combined. In combination with penicillin (or ampicillin), enterococcal infections are treated. It is also used for central nervous system infection caused by sensitive bacteria, such as meningitis, ventriculitis, can be used at the same time intrathecal injection as an auxiliary treatment.