Tilmicosin is a semisynthetic macrolide derivative of tylosin, which can interfere with the synthesis of bacterial proteins, and has antibacterial activity against certain Gram-negative bacteria, mycoplasma, rickettsia, and chlamydia Role, is a special antibiotic for livestock and poultry. Tilmicosin has a better bactericidal effect on gram-negative bacteria, Mycoplasma, and Pasteurella than tylosin, and can be used to control mycoplasma avian influenza and mastitis in lactating cattle.