Tilmicosin ,The antibacterial action of pharmacodynamics is similar to that of tylenol, which is mainly resistant to gram-positive bacteria, and is also effective for a small number of gram-negative bacteria and mycoplasma.The activity of mycobacterium tuberculosis, pasteurella and animal mycoplasma was better than that of tylosin.It is reported that 95% of the hemolytic pasteurella strain is sensitive to this product.Internal or subcutaneous injection of the product after absorption fast, the tissue penetration is strong, the distribution volume is large.