The effect of paclobutrazol is only to inhibit excessive vegetative growth. Of course, it is also used to shape plants in flower cultivation practice, so that they can achieve the purpose of dwarfing, thus improving the ornamental effect. The application of paclobutrazol will not affect the fruit quality, but will increase the fruit setting rate and make the fruit better. Of course, like all biological regulators, paclobutrazol has a time-sensitive effect on plants. According to the difference of plant size and application concentration, reasonable interval time should be adopted and applied several times to achieve ideal results.