The invention provides a duck premix. The premix consists of medical stone, methionine, flash-extraction mixture rice bran powder, choline, manganese sulfate monohydrate, zinc sulfate monohydrate, ferrous sulfate monohydrate, palm oil, 50% vitamin E, nicotinic acid, 1% potassium iodide, anhydrous copper sulfate, 0.5 million-IU vitamin A, 1% sodium selenite, glucose oxidase, 98% pantothenic acid, 2% biotin, 50% vitamin K, 98% pyridoxine, 0.5 million-IU vitamin D, 0.050% mildew inhibitor, 1% cyanocobalamine, 98% thiamine, 94% folic acid, 100 billion Bacillus subtilis, Bacillus licheniformis, 20billion Clostridium butyricum, and bran. The mixture in the flash-extraction mixture rice bran powder contains pomegranate peel, greater celandine herb, Chinese lovage and apple peel which have equalmass. The invention also provides applications of the premix. The premix can degrade mycotoxin in an edible feed and improve egg production rate and egg weight after being eaten by ducks. The premix can inhibit the propagation of mold, degrade mycotoxin, increase the content of beneficial bacteria in duck intestinal tract, reduce the harm of the mycotoxin to the intestinal tract, and improve the laying rate and the egg weight after being eaten by ducks.