Abstract:Objectoriented image analysis method is suitable for information extraction from highresolution remote sensing image, the core issue is to achieve the multiscale segmentation for highresolution remote sensing image. It is proposed an optimal splitscale model of multiscale segmentation based on objectoriented analysis methods, and made the experiment of image segmentation and the evaluation of segmentation quality. The results show that after this model the reliable optimal split scale can be obtained conveniently.