Abstract: Reproductive allocation is important in the life cycle of the plant. In the natural plant communities, plant can affect reproductive allocation by interaction itself genotype, non-living resources, species competition, plant size and other factors. By influencing factors of plant reproductive allocation, research methods and strategies to adapt to the environment in three aspects to elaborate on the study of reproductive allocation, as well as more specific grasp plasticity of plant reproductive allocation, in order to grasp the plasticity of plant reproductive allocation more specifically, and better study plant reproductive ecology.