Levofloxacin hydrochloride sodium chloride injection is prepared by dissolving levofloxacin hydrochloride into sodium chloride solution, which acts as a lysing enzyme. The main component is levofloxacin hydrochloride, whose main function is to kill bacteria, and also has a strong inhibitory effect on mycoplasma and chlamydia. Levofloxacin belongs to the third generation of quinolones, which are synthetic antibacterial drugs that work mainly by interfering with the synthesis of bacterial DNA. Levofloxacin is a broad-spectrum antibacterial drug with wide antibacterial range and strong antibacterial effect, which can be used to treat infections of respiratory system, digestive system, genitourinary system, skin soft tissue, bone and joint caused by sensitive bacteria, as well as mastitis, sepsis, wound infection, bacterial infection in the five senses, and also mycoplasma and chlamydia infections. Levofloxacin hydrochloride sodium chloride injection is easy to apply as it is used directly by drip without further dilution and only needs to be used once a day.