Abstract: The present invention relates to a method of preparing high-strength coated whole cottonseed for livestock feed, wherein the germination ability of whole cottonseed is removed using high-temperature and high-pressure steam, and the surface of whole cottonseed is coated with gelatinized starch with high viscosity, which is prepared by gelatinizing starch in a preparation process. According the method of the present invention, since the germination ability of whole cottonseed is removed, release of foreign genes into the domestic environment, which may occur when using whole cottonseed for livestock feed, may be fundamentally prevented, and thus the method of the present invention may contribute to protection of domestic plant genetic resources. In addition, the use of gelatinized starch with increased viscosity, which is prepared by gelatinizing starch in a preparation process, may dramatically increase the selection range of coating agents.