The invention discloses a feed for blue foxes in the growing period as well as a preparation method and application of the feed. According to the invention, the nutrition requirements of the blue foxes in the growing period are analyzed comprehensively, on the basis of nutrient collocation, sodium humate, aureomycin, colistin and other active biological substances are used to scientifically and reasonably prepare a mixed feed capable of satisfying the nutrition requirements of the blue foxes in the growing period. The feed comprises the following raw materials: swelled maize meal, bean pulp, meat and bone meal, feather meal, blood meal, high-fat DDGS, the sodium humate, stone powder, corn germ meal, lard, phospholipid oil, dairy salt, compound polymineral, methionine, lysine, compound vitamin, choline chloride, the aureomycin and the colistin. Experimental results show that compared with a conventional product, the feed provided by the invention has the advantages of enhancing the immunity of the blue foxes, increasing the conversion rate, preventing the blue foxes from diarrhea, lowering the feeding cost of the blue foxes, and the like.