Enrofloxacin hydrochloride is a third-generation synthetic quinolone antibiotic, which is a special new drug for the prevention and treatment of livestock and poultry and aquatic diseases. It not only retains the characteristics of wide spectrum, high efficiency, low toxicity, good absorption and convenient administration of quinolones, but also has a significant effect on various infections caused by a variety of bacteria. In particular, it is significantly more harmful to various mold forms of Chemalbook than other quinolones, tylosin Medicines such as Tamamycin. It is mainly used for bacterial and mycoplasma infections of livestock and poultry, such as respiratory tract, digestive tract, urinary tract, reproductive system and systemic infections of livestock and poultry, gill rot, enteritis, rotting tail disease and other bacterial infections of marine and freshwater fish.