Abstract: The present invention discloses a kind of diet capable of enhancing the immune function of baby dogs, wherein, the raw materials of which consist of main components, first auxiliary components, and second compounding components; wherein, the main components in terms of mass percent consist of: 80-90% of high protein material, 5-10% of vegetable adhesive, 0.1-0.2% of multiple vitamin, 0.01-0.1% of compound trace elements, and the remain is fermentation preparation; and the first auxiliary components in terms of mass percent consist of: 20-40% of montmorillonite, 10-30% of fish meal, 10-16% of seaweed, and the remain is Chinese herbal medicines; and the second compounding components consist of: beer yeast, linseed oil, cod liver oil, and corn oil. The present invention discloses a method for preparing the aforesaid diet capable of enhancing the immune function of baby dogs. The present invention discloses a method for using the aforesaid diet capable of enhancing the immune function of baby dogs.