Suspension for injecting tilmicosin and preparation method thereof

The invention relates to the field of medicines for livestock and poultry, and in particular provides a suspension for injecting tilmicosin and a preparation method thereof. The suspension for injecting tilmicosin contains the following components in mass-to-volume percentage: 5-30% of tilmicosin, 0.1-5.0% of a thickening agent, 0.1-15.0% of a surface active agent, and 0.01-1% of an antioxidant. After the suspension for injecting tilmicosin disclosed by the invention is injected into an animal body, the toxic and side effects of medicines are reduced; the internal half-life periods of the medicines are prolonged; the bioavailability of the medicines is increased; the use amounts of the medicines are reduced; furthermore, because of having higher superficial area, the suspension can be rapidly absorbed in the animal body; the use target animal range of the tilmicosin injection is prolonged; the pharmacological effect is increased; and the cost is saved.