Abstract: The promotive effects of abscisic acid on bud formation of common freesia callus were studied. The results are summarized as follows:1.The floral envelope was cultured on MS medium supplemented with BA 1 mg/1 and NAA 0,1 mg/1, The frequency of culli induction and bud formation were a little. But the floral axis of the common freesia cultured on MS medium added with IBA, IBA greatly stimulated root formation in the concentration of 0.5-2 mg/1.2.When MS medium added with BA 0.1 mg/1 and 2,4-D 0.1 mg/1, the activated carbon played an important role, as to promote the culli induction and bud formation. The optimum concentration of the activated carbon was 0.8%.3.Abscisis acid is obviously beneficial to promote the bud strong in the concentration of 5 mg/1.