An animal feed additive for reducing methane gas by utilizing a nanotechnology in accordance with the present invention means a new technology conducting functions for promoting digestion of livestock and reducing generation of methane gas from the livestock by adding a feed additive made of nanomaterials to the conventional animal feed. The present invention is mainly aimed at allowing nanoelements to conduct functions for promoting digestion of livestock and reducing generation of methane gas from the livestock at the same time when an animal feed is digested by adding nanomaterials to the animal feed so as to enable the nanomaterials to be stably mixed with the animal feed. The animal feed additive for reducing methane gas by utilizing a nanotechnology in accordance with the present invention, which is developed to conduct various functions by being added to an animal feed, comprises oak charcoal nanopowder, magnesium oxide nanopowder, potassium chloride nanopowder, potassium monohydregen phosphate nanopowder, and fumaric acid nanopowder and can markedly reduce generation of methane gas when livestock and animals are fed with a feed additive manufactured by using the ingredients. Effects of the animal feed additive for reducing methane gas by utilizing a nanotechnology in accordance with the present invention are as follows. Methane contained in belching and gas released from cattle and sheep is reduced. A smell of excrement is reduced. Absorption in animal intestines is enhanced so feed consumption can be reduced. The number of parasites in intestines of livestock is reduced. Good quality of milk is produced from cows, and milk production can be increased. Meat quality of beef cattle is enhanced, and a growth rate is increased. Animal stress is reduced, and immunity against diseases can be enhanced.COPYRIGHT KIPO 2016본 발명에 따른 나노기술을 활용한 메탄가스 감소용 동물용 사료첨가제란 기존의 동물용 사료에 나노물질로 된 사료첨가제를 첨가함으로써 가축의 소화흡수를 돕고 메탄가스발생을 줄이는 기능을 수행하는 신기술을 의미한다.본 발명은 나노물질을 동물용 사료에 투입함으로써 나노물
