Rumen slow release tablet containing eprinomectin and preparation method thereof

The invention provides a rumen slow release tablet containing eprinomectin. The rumen slow release tablet is prepared from the following ingredients in parts by mass: 0.5 to 20 percent of the eprinomectin, 1 to 5 percent of a framework dissolution agent, 10 to 70 percent of a specific gravity regulator, 1 to 20 percent of a bonding agent, 0.1 to 1 percent of a lubricating agent, 0.05 to 1.0 percent of an antioxidant and 5 to 50 percent of a filling agent, wherein the sum of the mass percent of the raw materials is 100 percent. A direct tabletting method is used for preparation. The defects ofthe conventional rumen slow release preparation that the production process is complicated, the cost is relatively high, a metal device of a drug release system cannot be taken out and the like are overcome. The medicine treatment effect is obviously improved; the continuous drug release time of the medicine in rumen reaches 90 days; no medicine remains in milk; the safety of the cattle and sheepdeep processing food is im