Abstract: Skeleton extraction is a fundamental part in simulation and modeling of point cloud trees. According to topology, a novel skeleton extraction method, which based on physical force field, is first proposed in this paper. First, the point cloud tree is layered by space subdivision method, and a simplified representation of the feature points is established under the neighbor relationships. Next, the feature points are connected by calculating the geodesic distance. Then, the surface skeleton is compressed into trees by applying force field. Finally, the final skeleton will be acquired by polishing it according to a threshold setting. The experimental results indicate that the algorithm can provide an satisfactory result, and the algorithm performance is verified using datasets ofmichelia and cherry trees.