The present invention relates to an additive composition for livestock feed, containing pozzolan, and specifically, the present invention provide a novel use of an additive composition for livestock feed, the composition containing, as an active ingredient, pozzolan, which has an excellent antibiotic effect to substitute for a conventional antibiotic agent, enhances the immune function, and removes bad smells, and thus is very suitable for livestock feed.La présente invention concerne une composition dadditif pour aliment pour bétail contenant de la pouzzolane. Linvention concerne plus précisément une nouvelle utilisation dune composition dadditif pour un aliment pour bétail, la composition contenant, en tant que principe actif, de la pouzzolane qui a un excellent effet antibiotique, à la place dun agent antibiotique classique. La composition stimule la fonction immunitaire et élimine les mauvaises odeurs, et est donc fortement appropriée pour les aliments pour le bétail.본 발명은 포졸란을 포함하는 가축 사료 첨가용 조성물에 관한 것으로, 상세하게는 종래의 항생제를 대체할 수 있는 항균효과가 뛰어나고 면역기능을 강화시킬 수 있으며, 악취제거 등 가축의 사료용으로 매우 적합한 포졸란을 유효성분으로 포함하는 가축 사료 첨가용 조성물의 신규 용도를 제공하는 것이다.