The invention discloses a wild duck feed and a preparation method thereof. The wild duck feed comprises the following raw materials in parts by weight: 560-590 parts of soybean powder, 340-360 parts of corn powder, 120-130 parts of freshwater shrimp powder, 45-50 parts of bone powder, 30-45 parts of wheat powder, 340-360 parts of rice bran, 230-240 parts of alfalfa powder, 30-40 parts of spirulina, 2-3 parts of circium japonicum, 4-5 parts of glossy privet fruit, 1-2 parts of root of red-rooted salvia, 12-13 parts of gynostemma pentaphylla, 1-2 parts of watermelon peels, 1-2 parts of broadleaf holly, 2-3 parts of pearl grass, 1-2 parts of eleusine indica, 1-2 parts of crinite pogonatherum, 2-3 parts of pseudostellaria heterophylla tubers and 5-6 parts of a phagostimulant. The wild duck feed does not contain any pigment and is high in nutrient content; various natural plants and traditional Chinese medicines permeate into a wild duck, so that the effects of improving health, preventing diseases and prolonging life can be achieved after the wild duck is eaten by people, and a healthcare effect on a human body is obtained.