The present invention relates to a composition for promoting the growth of animals, comprising extracts of Artemisia capillaris thunberg., Acanthopanax and garlic, as well as a feed composition comprising the same. The composition for promoting the growth of animals shows the excellent effect of promoting the secretion of growth hormone. Particularly, when the feed composition comprising the animal growth-promoting composition is administered to livestock animals, it will show the excellent effects of body weight gain, meat quality improvement and milk production increase in the livestock animals.