Fuente: WIPO "organic farming" The present invention relates to an agent for promoting the growth of plants, containing live bacteria of Bacillus amyloliquefaciens, and a method for preparing the same and a method for promoting the growth of plants by using the same. According to the present invention, the agent for promoting growth can be applied to various plants, crops, fruit trees, and the like, provides excellent effects of root colonization and growth promotion merely by spraying the agent during early stages of growth, and has excellent storage stability since the activity of the live bacteria is maintained even when stored for several years.