Brassinolide is a new type of sterol plant endogenous hormone, which can significantly increase plant vegetative growth and promote fertilization at very low concentrations. Brassinolide is recognized internationally as a highly effective, broad-spectrum, non-toxic plant growth regulator with the highest activity. It has the dual role of splitting and extending plant cells, promoting the development of roots, enhancing photosynthesis, and increasing the chlorophyll content of crops. Promote the effective absorption of fertilizers by crops, assist in the good growth of disadvantaged parts of crops, promote roots and strong seedlings, preserve flowers and fruits; improve crop resistance to cold, drought, and salt-alkali resistance, and significantly reduce the occurrence of diseases; It can alleviate the occurrence of phytotoxicity. After the phytotoxicity occurs, it can be used to detoxify, so that the crop can quickly resume growth, and can eliminate disease spots; brassinolide can also significantly increase the yield and improve the quality of crops