The invention discloses a Wenchang chicken feed containing corn starch and a preparation method thereof, and the preparation method comprises the following steps: selecting the high-purity corn starch, and further adding corn, soybean meal, corn gluten meal, palm kernel meal and other raw materials, crushing, and uniformly mixing; then adding soybean oil, methionine, threonine, multiple vitamins and other nutritional agents, uniformly mixing, and then performing steam modulation for enabling the corn starch to achieve a certain degree of ripening; and further performing granulation, thus obtaining a finished product. The Wenchang chicken feed can be used for promoting the subcutaneous, intramuscular and abdominal fat deposition of Wenchang chickens, improving the carcass quality and the chicken flavor, further saving the using amount of high-price grease and having no influence on the culture effect or improving the culture effect.