This paper studied the effects of the fermentation broth,supernatant and pellet of Bacillus licheniformis L3 on corn and rice respectively.The results showed that the fermentation broth of Bacillus licheniformis L3 had significantly effect on corn.It was mainly caused by the pellet of the fermentation broth of Bacillus licheniformis L3.Analysis of the fermenta-tion broth showed that cytokinin was produced by Bacillus licheniformis L3.