With the aim to achieve the quantified and visualized expression of crop growth, taking corn as an example, a simulation framework, which integrated parametric keyframe animation with the skeleton model was proposed. At first, a skeleton model for its topological structure was adopted, which was defined based on a precise geometric model. The dynamic creation of the parabolic curve of blade midrib integrated time variant was used to stimulate the elongation of leaf skeleton. With parametric keyframe technique, of which each keyframe parameters was acquired from the observed data or the output of corn growth model, the animation could be obtained by manual interaction. Experimental results showed that the proposed method could simulate the basic movements of corn growth visually with highly realistic rendering effects. It provides a simple and general dynamic process simulation for plant growth.