The invention discloses a sheep feed and a preparation method thereof, and belongs to the technical field of feed preparation. The feed comprises the following raw materials: pumpkin powder, potato vine powder, straw powder, bean cakes, pomacea canaliculata powder, betaine, table salt, Chinese material medicine preparations, vitamins, micro elements, bacterium preparations and enzyme preparations. The feed is prepared through the following steps: baking the raw materials, crushing the baked raw materials, screening the crushed raw materials, mixing the screened raw materials, sterilizing the mixed raw materials, cooling the sterilized raw materials and the like. The feed is reasonable in formula, rich in nutrition, can sufficiently meet growth requirements of sheep, promotes the healthy growth of the sheep, and shortens the growth cycle. The sheep feed disclosed by the invention, combines the efficacies of varied traditional Chinese medicines, so that the sheep feed can have the effects of resisting bacteria, diminishing inflammation, clearing heat and removing toxicity, enhancing organism immunity, and the like, and can enhance the disease resistance of the sheep, so that the attack rate is reduced by 7.5%-8.33%, and the mortality rate is reduced by 5.84%-6.67%.