The invention discloses a fattening sheep feed as well as a preparation and use method thereof. The fattening sheep feed comprises the following raw materials in percentage by weight: 20-30% of caragana korshinskii kom, 10-15% of red jujube powder, 4-8% of dried vinasse and soluble matters thereof, 30-40% of corn, 5-10% of soybean meal, 4-8% of cottonseed meal, 3-7% of rapeseed meal, 5-10% of millet oil bran, 1-2% of stone powder, 0.5-1% of calcium hydrogen, 0.8-1.5% of table salt, 0.3-0.5% of baking soda, 1.5-2.5% of yeast powder and 1% of a sheep premix. The millet bran, the red jujubes and the caragana korshinskii kom, which are produced in Shanbei region, are developed and used, so that the problems that Shanbei red jujubes are unmarketable and the caragana korshinskii kom is stumped are solved, and the nutrient value of the Shanbei red jujubes and the nutrient value of the caragana korshinskii kom and the unique feeding characteristics are used. Fattening sheep fed with the feed disclosed by the invention are high in growth rate, low in cost and good in meat quality.