Thidiazuron is a kind of plant growth regulator with cell excitement activity. It is mainly used as a cotton leaf agent, or it can also be used for apple trees, grapes, hibiscus dehydrations, vegetable beans, soybeans, peanuts and other crops, which have obvious inhibitory effects. Used as a plant growth regulator, it's suitable for cotton and other deeds. As a substituted urea plant growth regulator, Thidiazuron is mainly used in cotton and used as a defoliant in cotton planting. After thidiazuron is absorbed by the leaves of the cotton plant, it can promote the natural formation of the separation tissue between the petiole and the stem as soon as possible and cause the leaves to fall, which is beneficial to mechanical cotton harvesting and can advance the cotton harvest by about 10 days, helping to improve the cotton grade. It has strong cytokinin activity at high concentrations and can induce plant cell division and promote callus formation. It can promote plant growth at low concentrations, preserve flowers and fruits, accelerate fruit development and increase yield. When used on beans, soybeans, peanuts and other crops, it will significantly inhibit growth, thereby increasing crop yields.