The early fruits of fruit trees and the fruit trees reached the young age, and the flowers were small, the yield was low, and the economic results were poor. In order to make fruit trees “small, small†and produce less flowers, plant hormones are the best help for fruit trees. Phytohormone has a small amount of drugs, low cost, a wide range of physiological effects, play a role in the rapid decomposition of the plant, light pollution to the environment, can overcome the size of fruit trees, improve fruit quality, increase storage and transportation and other effects. The hormones that can increase the fruit setting rate of fruit trees are: gibberellin, chlormequat, and rhubarb, 2,4-D (dichlorophenoxyacetic acid), naphthylacetic acid, and pomegranate. 1, gibberellin apple, jujube, hawthorn, citrus, figs and other fruit trees flowering, spraying 100ppm of gibberellin, fruit setting rate increased by 1 to several times than the control. 2. Chlorothorax sprayed grapes with 300-500ppm of chlormethorine in the first 1-3 weeks before the grapevine, which can increase the fruit set rate of 30-100%. 3, in the apple, apricot, peach, pear and other fruit trees sprayed on the concentration of 5-50ppm of the plastic element, can make the fruit set rate increased 1-5 times. The spraying time ranges from flowering to flowering. 4,2,4-D sprayed 2,4-D with 20ppm at the flowering stage of hawthorn, jujube, apple and other fruit trees, which increased the fruit setting rate by 37%; and also had a significant effect by spraying 8-10ppm 2,4-D. . 5, naphthyl acetate grape berry in the size of peas, with 300ppm naphthalene acetic acid impregnated ears, can improve the fruit set rate of 45-100%. The use of 10ppm naphthalene acetic acid sprayed jujube trees, can significantly increase the fruit setting rate, spraying time in the jujube flowering period. 6, than the long time in the grape flower spray 500-1000ppm than the long, can increase the fruit setting rate of 35% -100%. The use of phytohormones should be noted: 1, should be strictly in accordance with the tree species hormone selection, dosage and use time. If spraying on other tree species, a small-scale test should be conducted first, and the test should be conducted gradually from low to high concentrations, and it should not be used blindly in large areas. 2. It should be carried out in cloudy weather without wind, or in the morning and evening, in order to facilitate the absorption and utilization of fruit trees. In addition, the use of hormones can not be in contact with copper and copper formulations of pesticides, and to use the current distribution, can not be placed too long.