3-indolbutyric acid is not easy to be oxidized in plants, and its conductivity is poor. It has a physiological effect similar to indoleacetic acid and can act on plant cell division and cell growth, but it is not as obvious as indoleacetic acid. It is mainly used to promote cuttings and roots and effectively promote cell division of cambium. It can maintain the efficacy for a long time, form more and slender adventitious roots, and the effect of mixed application with naphthylacetic acid is better. 3-indole butyric acid can be used for cutting and cutting of chrysanthemum and other ornamental plants to promote rooting. The concentration is 0.5 ~ 1.0mg/l, but not for the leaves of plants. Degradation and metabolism: it can degrade rapidly in soil.