The form of the Apple tree is decided by the organ position of the tree, it affects not ONLY the relationship between the vegetative growth and the fruit production, but also the fruit quality. In this research, the continuous growth for 3 years was gotten with polhemus fastrak, and the apple tree model was built in the POV-ray to simulate the interception of the sunlight. A mathematic model was built between the form and the photosynthetic efficiency, the growth as the index of the form while the interception of the light as the index of the photosynthetic efficiency. Utilizing this model to analyses the effects of the form on the apple tree’s photosynthetic efficiency, this result show a reference for the apple trees management.