The invention discloses a formula of a special completely mixed pellet feed for fattening sheep and a preparation method. The formula comprises corns, barley straws, 
sunflower cakes, alfalfa 
meal, 
cottonseed meal, wheat middling, malt roots, 
soybean meal, stone powders, molasses, puffing 
urea, baking soda, salt, 0.2% of polymineral for mutton sheep, 
calcium hydrogen phosphate, multivitamins for mutton sheep, 
monensin, a sweetener and a 
flavouring agent, wherein nutrients comprise dry matters, crude 
protein, 
calcium, 
total phosphorus, the salt, digestible energy for sheep and coarse 
fiber. The preparation method comprises the steps of: mixing the stone 
powder, the baking soda, the salt, the 0.2% of polymineral for mutton sheep, the 
calcium hydrogen phosphate, the multivitamins for mutton sheep, the 
monensin, the sweetener and the 
flavouring agent to prepare a semi-finished product A; 
grinding the corns, the 
sunflower cakes, the alfalfa 
meal, the puffing 
urea, the 
cottonseed meal, the wheat middling, the malt root, the 
soybean meal and the barley straws; and evenly mixing the materials by adopting a mixing 
machine, preparing the materials to be granular through a granulating process, and spraying the molasses on the surface of the pellet feed through a spraying process. The special completely mixed pellet feed for fattening sheep accords with the national 
green food concept, and has a good development prospect.