Application of secoisolariciresinol diglucoside in preparation of drug with resistance to eimeria tenella

The invention discloses an application of secoisolariciresinol diglucoside in preparation of a drug with resistance to eimeria tenella. Powder is prepared from the secoisolariciresinol diglucoside and acceptable auxiliary materials, is added to feed and is mixed uniformly, and chickens are fed according to the daily amount of feed; or water-soluble secoisolariciresinol diglucoside powder is prepared from the secoisolariciresinol diglucoside and dissolved in water, and the chickens are fed according to the daily drinking amount. Animal infection experiments prove that the ACI (anti-coccidial index) of the secoisolariciresinol diglucoside can be up to 165 or higher, and the secoisolariciresinol diglucoside has a better eimeria tenella resistant effect. Compared with a conventional anti-coccidial drug, namely, sulfachloropyrazin, the secoisolariciresinol diglucoside has a remarkable eimeria tenella resistant effect. According to the application of the secoisolariciresinol diglucoside, the problem of severe drug