Abstract: According to the requirement of the dimensionality reduction of solid models,a multi-resolution medial axis generation method is proposed for solid models.According to different model levels,the parts of the model that need to be refined are found out first.Then,the boundary is voxelized with the help of the results.After that,the distances of the multi-resolution voxels are computed by distance dilation method.Finally,the multi-resolution medial axis voxels are computed according to the distances of voxels.Several groups of experiments are given to demonstrate that the multi-resolution medial axis of high quality can be generated with low time and space cost using the proposed method.