The invention discloses a preparation method of a green palatable pig feed. The preparation method comprises the following steps of crushing paper mulberry trees, performing screening, adding blood powder, dry yeast and water, performing uniform mixing, performing sealed fermentation, adding peanut protein powder and water, performing stirring, adding neutral protease, adjusting temperature, performing stirring, performing inactivation, and performing freeze drying so as to obtain a material a; crushing buckwheat, polished glutinous rice and sweet potatoes, then adding the potato powder and water, performing cooking, and reducing the temperature to room temperature so as to obtain a material b; and adding mulberry leaves, corn cob powder, azolla imbricata leaves, alfalfa powder, sodium chloride, complex enzymes, trace elements and the material a to the material b, performing uniform mixing, performing granulation, and performing drying so as to obtain the green palatable pig feed. Thepig feed obtained by the preparation method disclosed by the invention not only can improve the disease resistance of pigs, but also can improve the digestion and absorption capacity of the feed, so that environment pollution of elements of nitrogen, phosphorus and the like in excrement and urine is reduced; and besides, pork contains few heavy metals, so that promotion of the health of human bodies is facilitated, and ecological breeding requirements are met.