Broad-spectrum antibacterial activity, good bactericidal effect, almost all bacteria antibacterial activity than norfloxacin and enoxacin 2 ~ 4 times stronger than enterobacter pylori, pseudomonas aeruginosa, haemophilus influenzae, Neisseria gonorrhoeae, streptococcus, Legionella, Staphylococcus aureus antibacterial.