Abstract: By means of spatial relation analysis,we discussed the limitations of current proximity models among area features,and formed a cognitive framework that external and internal distance between central points,tendency length of boundaries are the three key-factors of this issue.We proposed the lateral,the depth and the whole proximity,and set up the quantitative models based on partitioning central line by boundaries and constrained Delaunay triangular network.Finally we defined the data structures and constrcting methods of proximity for area features layer.