Gibberellic acid is one of the important endogenous hormones that promote plant growth and development. In plants, gibberellins are synthesized in germinated seeds, young shoots, growing leaves, blooming flowers, stamens, pollen grains, fruits and roots. Those synthesized at the root move upwards, while those synthesized at the top move downwards, and the transportation site is in the phloem, and its speed is similar to that of photosynthetic products. The artificially produced gibberellin is mainly absorbed by leaves, shoots, flowers, seeds or fruits, and then moves to the site of action. It has a variety of physiological functions, changing the ratio of female and male flowers in some crops, inducing parthenocarpy, accelerating the growth of some plants, promoting fruit setting; breaking seed dormancy, early seed germination, accelerating the elongation of stems and the growth of some plants. Bolting; expand leaf area, accelerate young shoot growth, facilitate accumulation of metabolites in phloem, activate cambium; inhibit maturation and senescence, lateral bud dormancy and fast stem formation.