Abstract: Plant growth regulators have been widely used to regulate the growth and development of various plants.In production, exogenous hormones are often used to regulate plant growth, improve characters and increase yield based on existing research.Based on the research on plant hormone regulation of plant growth and development at home and abroad in recent years, this study expounded the effects of plant growth regulators auxin, cytokinin, gibberellin, abscisic acid and ethylene on different plant growth.