High-energy supplemental feed used for increasing growth rate of beef cattle in fattening period as well as preparation method thereof

The invention relates to a high-energy supplemental feed used for increasing the growth rate of beef cattle in the fattening period as well as a preparation method thereof. The high-energy supplemental feed is prepared from steam-flaked corn, wheat, sunflower cakes, cottonseed protein powder, whole cottonseed, fractional distillation saturated fat, rumen-protected choline, an antioxidant and beef cattle premix. According to the invention, through strict raw material selection and reasonable formula, the nutrition energy matching proportion of the high-energy supplemental feed is balanced, the carbohydrates energy raw materials such as the steam-flaked corn and wheat which can be quickly degraded are provided, the rumen-protected fat type energy raw materials such as the whole cottonseed and fractional distillation saturated fat are provided, at the same time, the influence of the high-energy supplemental feed on the liver of beef cattle is considered, and the rumen-protected choline is used, so that fat is better metabolized, and the health of beef cattle is guaranteed; after the feed is used, the daily gain of beef cattle can be remarkably increased, the marketing time is shortened, and the economical benefit is remarkable.