Virtual plant is a novel research issue in computer applications, and realistic plant animation is widely used in many fields. The research of precise, efficient and photorealistic plant animation synthesis is one of the important issues that the current virtual plant facing with. This paper using maize achieves real time and realistic plant animation, based on the platform of Unity3D. The virtual maize model is generated by use of interactive parameterized modeling method. By setting a good interactive interface, users can dynamically adjust the parameters to realize different animation effects. Finally, concluding and analyzing this method. In addition future research and application direction is discussed in order to achieve better plant animation.